Pages on Data Toolbox

Changelog

Tue, 10 Mar 2026 00:00:00 +0000

Roadmap

AI-powered automatic chart selection and visualization tool
Project sharing within organizations

And more. This list will be updated as needed.

✅ Public sharing feature for created interactive visualization content
✅ CSV support for data used in Cytoscape, Gephi, and similar tools

Changelog

May 7, 2026

Prepared tools.data-viz-lectures.com as the public overview site for the data visualization and data preparation tool services.

May 4, 2026

Moved to a new pricing structure that treats data visualization and data preparation as separate service scopes.

April 21, 2026

Separated the authentication and account dashboard domains.

Sign-up and login use https://id.data-viz-lectures.com/ as the shared entry point.
The data visualization account dashboard is available at https://app.dataviz.jp/.
The data preparation account dashboard is available at https://app.dataprep.jp/.

You will be redirected automatically, but please update your bookmarks.

April 16, 2026

Added new tool: “Bar Chart Cross-Filter.” Upload CSV or TSV data and click across multiple bar charts to cross-filter and explore your data — a BI-style capability now available as a standalone tool.

April 12, 2026

Localized checkout and sign-up flows for English users. The entire subscription experience — from pricing to payment — is now available in English.
Introduced USD pricing for international users. Plans now start at $17/month for individuals and $72/month for small teams.
Renamed “Enterprise Plan” to “Group Plan” for consistency across billing and pricing pages.

April 9, 2026

Launched multi-user plans for teams and departments. Choose from plans for 5, 10, or 30 members.

April 8, 2026

Fixed a display issue around the common header that occurred in some tools.

April 5, 2026

Added new tool: “Japanese-Western Calendar Converter”

April 3, 2026

Launched the “Data Library” page. Accessible from the navigation bar, it lets you browse and search sample datasets available across tools, then launch a compatible tool with the selected data.
Added a “Sample Data” button to each tool’s toolbar. You can now browse and load compatible sample datasets directly from within the tool.

April 2, 2026

The account dashboard domain has been changed from auth.dataviz.jp to app.dataviz.jp. You will be redirected automatically, but please update your bookmarks.
The tools listing page has been moved from the public site https://www.dataviz.jp/ to the members-only page https://app.dataviz.jp/.

March 31, 2026

Added a corporate number database that can be called from OpenRefine’s “Reconciliation” feature

March 24, 2026

Added new tool: “Draw-to-Answer Line Chart”

March 23, 2026

Added new tool: “3D Surface Chart”
Added public sharing feature to Parallel Coordinates

March 18, 2026

Added CSV format and Shift JIS data file support for Gephi and Cytoscape
Added a spiral chart example using RawGraphs to the showcase

March 17, 2026

Added Shift JIS data file support for RawGraphs, Parallel Coordinates, Voyager, Word Cloud, and Data Illustrator

March 14, 2026

Added new tool: “Parallel Coordinates”

March 12, 2026

Removed unnecessary line breaks within cells in Tabula
Added new tool: “Text Entity Extraction Tool”

March 11, 2026

The service was officially launched.

Privacy Policy

Tue, 10 Mar 2026 00:00:00 +0000

Version 1 - Enacted: March 10, 2026

“Data Toolbox” (hereinafter referred to as “the Service”) considers the protection of users’ personal information to be an important responsibility, and hereby establishes the following Privacy Policy.

This Policy describes how personal information is handled within the Service.

1. Information We Collect

The Service may collect the following information.

Data That Users Visualize and Analyze

The Service provides tools primarily intended for data visualization and analysis.

Basic Operation Data uploaded or entered by users (file contents such as CSV, Excel, JSON, manually entered data, etc.) is processed on the client side (within the user’s browser) for most features. This data is not sent to or stored on the Service’s servers.
When the Save Feature Is Used In certain visualization tools, only when the user explicitly selects “Save”, the following data is stored on the server:
- Chart and configuration data that the user has instructed to save
- Data processing via OpenRefine (temporary storage to prevent loss of work data)
Saved data is handled as follows:
- It is linked to the user’s account and accessible only by the user.
- Purpose of storage: Re-display, editing, and sharing (when permitted by the user) of saved content
- Retention period: Until the user deletes it (or all data is deleted upon account deletion)
- Upon request for deletion, data will be promptly removed.
Note Regarding Data Containing Personal Information The Service does not review or screen the content of data entered or uploaded by users in advance. If you upload data containing personal information to the server using the save feature, please handle it under your own responsibility. Unless you use the save feature, no data, including any personal information, will remain on the server.

Unless the save feature is used, no data that has been entered or uploaded (including data containing personal information) will remain on the server. However, OpenRefine performs temporary storage to prevent loss of work state.

Retention Period

Data stored on the server using the save feature (charts, settings, source data, etc.) is retained until the user instructs its deletion.
If an account deletion request is made, all associated saved data will be completely deleted without delay (typically within 7 days).

Information Provided by Users

Name
Email address
Account information
Inquiry details

Information Collected During Service Use

Service usage history
IP address
Browser information
Information obtained through cookies and similar technologies

The Service uses the external payment service Stripe, Inc. for processing payments for paid services.

Credit card information entered by users is sent directly to Stripe’s system and is not stored on the Service’s servers.

The payment-related information that the Service may obtain is limited to non-sensitive information such as the following:

Payment status
Card brand
Last 4 digits of the card number
Payment date and time
Subscription status

2. Purpose of Use of Personal Information

The information collected is used for the following purposes:

Provision and operation of the Service
Management of user accounts
Improvement and development of the Service
Responding to inquiries
Prevention of unauthorized use
Addressing violations of the Terms of Service
Payment processing and contract management for paid services
Notification of important announcements

3. Provision of Personal Information to Third Parties

The Service will not provide users’ personal information to third parties except in the following cases:

When the user has given consent
When required by law
When necessary for the protection of life, body, or property
When requested by a public authority

4. Use of External Services

The Service may use the following external services for its operation.

Stripe (Payment Processing)

Payment processing for paid services is handled by Stripe, Inc. Credit card information entered by users is securely processed by Stripe, and the Service does not obtain or store sensitive information such as card numbers. For information on how Stripe handles personal information, please refer to the following:

https://stripe.com/jp/privacy

5. Cookies and Analytics

The Service may use cookies and similar technologies for the purpose of improving the Service and analyzing usage patterns. Cookies are small pieces of data stored in the user’s browser and do not contain information that directly identifies an individual. Users may refuse cookies through their browser settings; however, doing so may result in some features of the Service becoming unavailable.

6. Security of Personal Information

The Service implements reasonable security measures to prevent leakage, loss, and alteration of personal information. Regarding credit card information, the Service is designed not to retain card information on its side by using a PCI-DSS compliant payment service (Stripe).

7. Disclosure, Correction, and Deletion of Personal Information

Users may request the disclosure, correction, or deletion of their personal information.

If you wish to make such a request, please contact us at the address provided below. After verifying your identity, we will respond within a reasonable scope.

8. Use by Minors

If a minor wishes to use the Service, please obtain the consent of a parent or guardian before doing so.

9. Changes to the Privacy Policy

The contents of this Policy may be changed as necessary.

In the event of significant changes, users will be notified through the Service.

10. Contact Us

For inquiries regarding this Privacy Policy, please contact us at the following:

Data Toolbox Operator: Yuichi Yazaki

Google Forms

Pre-Contract Inquiry about 'Data Toolbox'

forms.gle

Version 1 - Enacted: March 5, 2026

FAQ

Sat, 07 Mar 2026 00:00:00 +0000

About This Service

What is Data Toolbox?

We provide a wide range of nimble data visualization (charts, data maps, network diagrams) and data wrangling tools — more diverse than Excel and easier than BI tools. Everything runs in your browser, and you can use all tools as much as you want with a flat-rate subscription.

Who is this service for?

This service is for anyone who works with data.

People who want to create charts that Excel can’t make
People who want to visualize data without programming languages like Python
People who want specialized visualizations such as maps, networks, or text
People who want to streamline data formatting and cleansing
It can be used for a wide range of purposes including general documentation, marketing, government, research, and data journalism.

What kinds of data visualizations can I create?

Create various charts
Exploratory data visualization
3D map visualization
Create data maps by prefecture or municipality
Network visualization
Text visualization

and more.

See the Choosing the Right Data Visualization Tool page for details.

What kinds of data wrangling can I do?

Visually cleanse data
Easily merge map data with thematic data
Quickly understand JSON structure
Fix character encoding issues
Easily convert addresses to latitude/longitude
Extract table data from PDFs
Quickly create buffer zones around POIs

and more.

See the Choosing the Right Data Wrangling Tool page for details.

Who owns the copyright of outputs (charts, etc.) created with these tools?

The copyright of visualizations you create belongs to you. You are free to publish and use them as you wish.

Can I use outputs (charts, etc.) created with these tools commercially?

Yes. You can freely use them in reports, presentations, papers, books, websites, and more.

Can I save my work?

For data visualization tools, we provide the ability to save your work as a project. These are listed on your dashboard and can be opened with a single click. Other tools (data wrangling, color design) do not have a save function — please download the output for your use.

What is a project?

We call the combination of “your data” and “your work in a tool” a “project.”

Can I start using it right away?

We are currently building and testing the service. We plan to launch around March 2026.

How to Use

Do I need to install anything?

No installation is required. All tools run in your browser. You don’t need any special software — just an internet connection and a web browser.

Do I need programming skills?

No programming is required. You can create charts and process data simply by uploading or entering your data. We’ve designed professional tools to be as simple to use as possible.

What data formats are supported?

Most tools accept data in CSV format. Some tools also support specific formats such as GeoJSON. Each tool’s page lists supported data formats and provides sample data.

Since Excel files can contain various data structures, we don’t support direct Excel uploads. Instead, we provide the versatile data cleansing tool OpenRefine.

Is sample data available?

We offer two types of data portals: sample data bundled with each tool, and original datasets curated based on popular requests.

Pricing & Subscriptions

How much does it cost?

The most basic Standard Plan is $20/month. Annual billing ($200/year) saves you $40 compared to monthly.

See the Pricing page for details.

Are subscriptions auto-renewed?

Yes. Using Stripe’s subscription system, your subscription is automatically renewed one month or one year after your payment date, depending on your plan.

Can I cancel at any time?

Yes, you can cancel at any time. After cancellation, automatic payments will stop, and you can continue using the service until the end of your current billing period.

Data Security

Can I use personal or confidential data?

Data used in our tools is generally not stored on our servers, but processing methods vary by tool. Some data visualization tools have a feature to save your work-in-progress, and in those cases data is stored on the server. For all other tools, data is not retained on the server side.

Future Plans

Will more tools be added?

We continuously add and improve tools in this service. We plan to add new data visualization and data wrangling tools on an ongoing basis. Some tools may be modified or discontinued. We welcome requests for tools and datasets, and will accommodate them as much as possible.

Adoption & Organizational Use

Can teams or companies use this?

Yes, teams and companies can use this service. As a suite of tools for streamlining data visualization and data wrangling, it can be used by people in various roles such as analysts and planners. It can also be adopted as a common data tool within a team.

However, a license is required for each user. We offer bulk account registration and volume discounts — please contact us via the Contact page.

Can it be used for corporate training or educational purposes?

Yes, it can be used for educational purposes. It can serve as a tool for learning data visualization and data literacy in university courses or corporate training. Since many of the tools are single-function, they are well-suited as teaching materials for understanding data structures and visualization mechanisms.

However, a license is required for each user. We offer bulk account registration and volume discounts — please contact us via the Contact page.

License

Wed, 04 Mar 2026 00:00:00 +0000

A list of licenses and credits for the tools provided by this service.

Open Source Software

The following tools are based on original open source projects. We are grateful to the developers of each project.

Color Brewer — Apache-2.0 License (Cynthia Brewer, Mark Harrower, The Pennsylvania State University)
Cytoscape — MIT License (Cytoscape Consortium)
D3.js — ISC License (Mike Bostock)
Data Illustrator — MIT License (Georgia Tech)
(Geo) Data Merger — MIT License (Fabio Berta)
GeoJSON.io — ISC License (Mapbox)
Gephi Lite — GPL-3.0 License (Gephi / OuestWare)
iwanthue — MIT License (Sciences Po médialab)
JSON Crack — Apache-2.0 License (Aykut Saraç)
kepler.gl — MIT License (Urban Computing Foundation)
Leonardo — Apache-2.0 License (Adobe)
Mapshaper — Mozilla Public License 2.0 (Matthew Bloch)
OpenRefine — BSD-3-Clause License (OpenRefine contributors)
Parallel Coordinates — BSD-3-Clause License (Kai Chang)
RAWGraphs — Apache-2.0 License (DensityDesign Lab, Politecnico di Milano)
Sankeymatic — ISC License (Steve Bogart)
Tabula PDF — MIT License (Manuel Aristarán, Mike Tigas, Jeremy B. Merrill)
Tilegrams — ISC License (Pitch Interactive)
Vega Editor — BSD-3-Clause License (UW Interactive Data Lab)
Voyager 2 — BSD-3-Clause License (UW Interactive Data Lab)
Easings Cheat Sheet — GPL-3.0 License (Andrey Sitnik, Ivan Solovev)
Map Tile Browser — MIT License

dataviz.jp Original Tools

The following tools are originally developed by dataviz.jp.

ADS-B / AIS Visualization
Aozora Bunko Ruby Remover
Address to Lat/Lon Converter
Buffer Generator
Cartogram Japan
Cartogram Prefectures
Choropleth Japan
Choropleth Prefectures
Coordinate System Converter
GTFS Network Data Converter
Lat/Lon Formatter
Mapbox Classic Style Generator
QuickChart UI
Shift JIS / UTF-8 Encoding Converter
SVG / GeoJSON Converter
SVG Gradient Editor
SVG Texture Editor
Word Cloud

Site

Built with Hugo.
Theme Stack designed by Jimmy.

Specified Commercial Transaction Act

Mon, 02 Mar 2026 00:00:00 +0000

Business Operator

Notation LLC

Business Location

N&E BLD. 7F, 1-12-4 Ginza, Chuo-ku, Tokyo 104-0061, Japan

Contact

info@notation.co.jp

Pricing

All prices are displayed inclusive of consumption tax.

Payment Method

We use Stripe for payment processing.

Handling of Personal Information

Please refer to our Privacy Policy.

Cancellations

No returns, refunds, or cancellations are accepted at the customer’s convenience. Please be aware of this before purchasing.

Supported Browsers

Latest versions of Chrome, Firefox, Safari, and Edge on desktop computers. Tablets and smartphones are not guaranteed to be supported.

Delivery of Products

Upon purchasing paid content, access will be available immediately after the payment process is completed.

Terms of Service

Mon, 02 Mar 2026 00:00:00 +0000

Version 1 - Enacted: March 10, 2026

These Terms of Service (hereinafter referred to as “these Terms”) set forth the conditions for using the data visualization and data preparation tool suite service “Data Toolbox” (https://tools.data-viz-lectures.com/) (hereinafter referred to as “the Service”) provided by Notation LLC (hereinafter referred to as “the Company”). Users shall use the Service upon agreeing to these Terms.

Article 1: Scope of Application

These Terms apply to all aspects of the relationship between users and the Company regarding the use of the Service.
Any individual rules or guidelines posted by the Company within the Service shall constitute a part of these Terms.

Article 2: Definitions

The terms used in these Terms are defined as follows:

“User” An individual or legal entity who uses the Service upon agreeing to these Terms.
“Account” The identification information assigned to a user in order to use the Service.
“Content” All information provided through the Service, including software, tools, programs, text, images, data, UI, and any other materials.

Article 3: Service Description

The Service is an online service that provides various tools for data visualization and data processing.
The Service includes multiple tools, but the features and content of each tool are subject to change.
The Company may add, modify, or remove features of the Service.
The Company may impose reasonable limitations on usage volume, processing frequency, data size, access frequency, and other usage methods in order to ensure the stable provision of the Service.
The Company may add, modify, or discontinue any tools, features, or content included in the Service.

Article 4: Account Registration

Users may be required to register an account in order to use the Service.
Users shall keep their registration information accurate and up to date.
Users shall manage their account information at their own responsibility.
The Company shall not be liable for any damages arising from unauthorized use of an account.

Article 5: Subscription

Part or all of the Service may be provided in a paid subscription format.
Subscriptions will automatically renew unless cancelled by the user.
Usage fees, payment methods, renewal cycles, and other details shall be in accordance with the information displayed on the Service.
Payments may be processed through third-party payment services such as Stripe.
Users shall also comply with the terms of service of the payment service.
The Company may change the features, content, usage fees, or pricing structure of the Service. Such changes will be communicated by posting on the Service or by other means the Company deems appropriate.

Article 6: Cancellation

Users may cancel their subscription through the prescribed method.
Once the cancellation procedure is completed, no charges will be incurred from the next renewal date onward.
Fees already paid will not be refunded, except as required by law or as otherwise determined by the Company.

Article 7: Handling of Data

Users shall be responsible for the content, legality, and right to use any data entered or uploaded to the Service (hereinafter referred to as “User Data”).
The Company has no obligation to monitor or guarantee the content of User Data.
When handling personal information or confidential information, users shall manage it appropriately at their own responsibility.
Even if User Data is stored or retained within the Service, the Company does not guarantee its storage, integrity, or continued retention. Users shall back up their data at their own responsibility as needed.

Article 8: Visualization and Analysis Results

Visualization results, analysis results, processed data, and other outputs generated by the Service are provided as reference information.
The Company does not guarantee the accuracy, completeness, or usefulness of such results.
Users shall use the results at their own responsibility.

Article 9: Prohibited Activities

Users shall not engage in the following activities when using the Service:

Activities that violate laws, regulations, or public order and morals
Activities that infringe upon the rights of the Company or third parties
Activities that interfere with the operation of the Service
Unauthorized access or attempts thereof
Using bots, scraping tools, automation tools, or similar means to extract content from the Service
Copying, reverse-engineering, or redistributing the software or features of the Service
Using the Service for the purpose of developing a competing service
Developing or providing a service that competes with the Company by utilizing the features of the Service
Any other activities deemed inappropriate by the Company

Article 10: Intellectual Property Rights

Intellectual property rights related to the software, tools, designs, text, images, UI, programs, and other elements of the Service belong to the Company or their rightful owners.
The copyright of visualizations, images, charts, processed data, and other outputs created by users using the Service (hereinafter referred to as “Generated Content”) belongs to the respective user, provided that such use does not infringe upon the rights of the Company or third parties, including software, templates, and design elements included in the Service.
Users may use, publish, and distribute Generated Content at their own responsibility.
Users hereby grant the Company a free-of-charge license to store, copy, process, display, distribute, embed, and otherwise handle Generated Content to the extent necessary for the provision and operation of the Service.
The Company may introduce Generated Content created by users for the purpose of promoting or publicizing the Service, provided that such use does not unreasonably harm the rights of the user.

Article 11: Third-Party Software

The Service may include open-source software or third-party software. The use of such software may be subject to their respective license terms.

Article 12: Changes and Suspension of Service

The Company may change, add, or remove the content of the Service without prior notice.
The Company may suspend all or part of the Service in the following cases:

System maintenance
Incident response
Force majeure
Other cases deemed necessary for operational purposes

Article 13: Suspension of Use

The Company may suspend or delete a user’s account without prior notice if the Company determines that the user falls under any of the following:

Violation of these Terms
Unauthorized use
Extended period of non-use
Other cases deemed inappropriate by the Company

Article 14: Disclaimer

The Company shall not be liable for any damages caused by system failures, data loss, service interruptions, or similar events in the course of providing the Service.
Even if the Company is found to be liable, such liability shall be limited to the total amount of usage fees paid by the user to the Company.

Article 15: Changes to the Terms

The Company may change these Terms when deemed necessary. The revised Terms shall take effect upon being posted on the Service.

Article 16: Governing Law and Jurisdiction

These Terms shall be governed by the laws of Japan.
In the event of any dispute arising in connection with the Service, the court having jurisdiction over the location of the Company’s head office shall have exclusive agreed jurisdiction as the court of first instance.

End of Terms

About Us

Mon, 23 Feb 2026 00:00:00 +0000

Operating Company

Notation LLC

Based on the belief that “data visualization is the intersection of expressive communication and problem-solving,” we provide new forms of notation to the world.

notation.co.jp

合同会社ノーテーション

notation.co.jp

About the Representative

Yuichi Yazaki

After seven years of experience as a user interface designer and art director at Business Architects Inc., Yuichi Yazaki went independent. He is engaged in a wide range of activities related to the practice and promotion of data visualization, including lectures at corporations and educational institutions, information dissemination through the website Visualizing.JP, and community activities through Data Visualization Japan.

He is the sole author of “The Complete Guide to Data Visualization Fundamentals” and co-author of “The RESAS Textbook” (Nikkei BP, 2016). He holds a Master’s degree in Design Science from Chiba Institute of Technology. He is the founder of Data Visualization Japan and a Yahoo! News Expert.

dataviz.jp

データ可視化の基本が全部わかる本

all-about-book.visualizing.jp

Contact

Mon, 23 Feb 2026 00:00:00 +0000

Pre-Contract Inquiries

For inquiries before signing up, please use the form below.

Google Forms

Pre-Contract Inquiry about “Data Toolbox”

forms.gle

Post-Contract Inquiries

After logging in, please contact us through the “Account Information” page accessible from your dashboard.

Pricing Plans

Mon, 23 Feb 2026 00:00:00 +0000

Search

Mon, 01 Jan 0001 00:00:00 +0000

Tools

Mon, 01 Jan 0001 00:00:00 +0000

Pages on Data Toolbox

Changelog

Roadmap

Changelog

May 7, 2026

May 4, 2026

April 21, 2026

April 16, 2026

April 12, 2026

April 9, 2026

April 8, 2026

April 5, 2026

April 3, 2026

April 2, 2026

March 31, 2026

March 24, 2026

March 23, 2026

March 18, 2026

March 17, 2026

March 14, 2026

March 12, 2026

March 11, 2026

Privacy Policy

1. Information We Collect

Data That Users Visualize and Analyze

Retention Period

Information Provided by Users

Information Collected During Service Use

Payment-Related Information

2. Purpose of Use of Personal Information

3. Provision of Personal Information to Third Parties

4. Use of External Services

Stripe (Payment Processing)

5. Cookies and Analytics

6. Security of Personal Information

7. Disclosure, Correction, and Deletion of Personal Information

8. Use by Minors

9. Changes to the Privacy Policy

10. Contact Us

FAQ

About This Service

What is Data Toolbox?

Who is this service for?

What kinds of data visualizations can I create?

What kinds of data wrangling can I do?

Who owns the copyright of outputs (charts, etc.) created with these tools?

Can I use outputs (charts, etc.) created with these tools commercially?

Can I save my work?

What is a project?

Can I start using it right away?

How to Use

Do I need to install anything?

Do I need programming skills?

What data formats are supported?

Is sample data available?

Pricing & Subscriptions

How much does it cost?

Are subscriptions auto-renewed?

Can I cancel at any time?

Data Security

Can I use personal or confidential data?

Future Plans

Will more tools be added?

Adoption & Organizational Use

Can teams or companies use this?

Can it be used for corporate training or educational purposes?

License

Open Source Software

dataviz.jp Original Tools

Site

Specified Commercial Transaction Act

Business Operator

Business Location

Contact

Pricing

Payment Method

Handling of Personal Information

Cancellations

Supported Browsers

Delivery of Products