Notice: dataviz.jp / dataprep.jp maintenance has ended

Thank you for using dataviz.jp and dataprep.jp.

Maintenance mode for dataviz.jp and dataprep.jp has ended, and the tools are now available again.

During maintenance mode, tool launch, editing saved projects, and export creation features were unavailable. The tools provided on dataviz.jp and dataprep.jp have now resumed.

We will continue to prioritize stable service operation. Depending on the content and situation, we may not be able to respond to general usage questions, how-to consultations, feature requests, or individual support for data processing and visualization work.

We will contact paid plan users individually when needed.

Free plan users can also use the tools within the available scope as before. Please continue to back up any data, visualizations, projects, and exported files as needed.

dataviz.jp and dataprep.jp will continue to operate as places to learn, try, and share data visualization and data preparation work.

We apologize for the inconvenience during maintenance and appreciate your continued use.

Last updated on 2026-07-01