Company Profile
Chuo-Sogo runs two businesses rooted in Japanese worksites: collecting and supplying training data for physical AI, and building websites for small local businesses.

Why we do this
From the worksites of Japan to the next industrial shift.
As AI moves into the physical world, we believe the scarcest input will be data from real work. A great deal of skill in Japanese industry still lives in the hands and eyes of the people doing it, passed on person to person. Capturing that work as training data for physical AI, before it is lost, is our core business.
Our first focus is industrial work: welding, piping, and metal fabrication. Beyond that, we do not draw a line by industry. Construction and building services, retail and hospitality, household and domestic work, and agriculture are within scope as well. What we bring is not a fixed set of industries but the ability to source a worksite in Japan that matches a given specification, clear the rights, and record there.
These are fields we are set up to take on, not facilities we already hold. To date, one site has agreed to filming: a factory producing steel water pipes and formed fittings, where the work includes manual welding and gouging. We are preparing a sample collection there.
In parallel, we build websites for small businesses in Japan so that local shops and workshops can benefit from technology as well. The work is simple to describe: a good business that no one can find online, made findable, at a price within reach.
The two businesses differ in scale but start from the same place: not at a desk, but at the worksite. We intend to remain a company that connects the worksites of Japan with technology.
From the CEO
CEO
Shion Seki
Became a founder in his final year of high school
I am Shion Seki, CEO of Chuo-Sogo Inc. I became a founder in my final year of high school, and I run this company today.
We think we are at the start of the period in which AI moves into the physical world. What that period will lack most is data that captures skilled work as it is actually performed. Recording the skills still held on Japanese worksites, before they are lost, is work we believe is worth doing now.
We started with industrial work, but we are not tying ourselves to one industry. Given a specification, we look for a site in Japan where that work is done, clear the rights, and record there. Taking on that whole path is how we see our role.
On the website side, I work directly with individual shop owners. The scale is different; the approach is not. We deal honestly with what is actually happening on the other side.
We are a small company. That lets us move quickly and keep our commitments small and concrete. Please feel free to get in touch.
Director
Toshiyuki Yamamoto
Founder of Chatwork
Toshiyuki Yamamoto, founder of the business chat service Chatwork (now kubell), sits on our board.
He built a service used across small and mid-sized companies in Japan from the ground up and took it through to a public listing. That experience now feeds into how decisions are made here. We are a young company, and his input goes into building it on a sound footing.
Company Profile
- Company name
- Chuo-Sogo Inc.
- Founded
- January 29, 2026
- CEO
- Shion Seki
- Director
- Toshiyuki Yamamoto (founder of Chatwork)
- Business
- Collection and supply of training data for physical AI / website production
- Location
- 1-5-18-3 Shinoharakita, Kohoku-ku, Yokohama, Kanagawa 222-0026, Japan
History
- January 2026
Chuo-Sogo Inc. founded
Registered in Kohoku-ku, Yokohama, Kanagawa, Japan.
- 2026
Website production business launched
Began offering one-time-fee website production for small shops and owner-operated businesses in Japan.
- July 2026
Physical AI training data business launched
Launched the physical AI training data business: egocentric video and tacit-knowledge annotation recorded at worksites in Japan, to each client’s specification.
CONTACT
Contact
Whether it concerns training data or a website, you can reach us here. We reply within two business days.