About TubeSaku
Tools, public data, and research to help creators and teams understand Japanese YouTube and streaming activity.
What we do
TubeSaku brings together observed trends, creator activity, and planning tools. You can explore public datasets, connect a compatible AI assistant through MCP, or read our published research. Custom analysis and reports are handled through individual inquiries.
Our public tools and datasets cover selected sources and channels. They are not a complete view of YouTube or a guarantee of future performance. Much of the dashboard and source material is in Japanese; this English section explains the service and provides access to English-language research.
Explore available data · How the data is interpreted · Read our research
Who operates the service
- Operator
- GIPU Limited (有限会社GIPU), Japan
- Representative
- Goichi Harada, CEO
- Business address
- Kuwano Building 2F, 6-23-4 Jingumae,
Shibuya-ku, Tokyo 150-0001, Japan - Company website
- gipu.app
- Research & editorial team
- Webbigdata Streaming Data Lab, operated by GIPU Limited
- Inquiries
- Contact TubeSaku
The same operator and address are listed on our Japanese company page.
See our work
Our work includes published research, creator tools, and open AI models. These links let you inspect the work directly.
- TubeSaku research — reports with study methods, limitations, and supporting data.
- Webbigdata on YouTube — videos about YouTube and streaming data, primarily in Japanese.
- Webbigdata on Hugging Face — public AI model repositories and model documentation.
- WebBigData.jp — Japanese-language AI articles.
- TubeSaku development updates on X.
How we explain and correct our work
We distinguish observed measurements, derived analysis, and illustrative examples. Research reports explain their own observation periods and methods. AI-assisted interpretation can be wrong, and a result from a selected sample should not be treated as a statement about all creators.
For a correction request, include the page URL and the information you believe needs checking. For listing changes or removal, select that category in the contact form. We review inquiries and may ask for clarification; we do not promise a fixed response time.