Our Team

Yasuhiro Watanabe

Co-founder, CEO

Yasuhiro is a successful venture capitalist in the Japanese tech space. After working for JAFCO, Japan's largest venture capital firm, he founded a venture capital firm called Incubate Capital Partners. His investment includes F@N Communications, Inc. (IPO in 2005), AIP Corporation (acquired in 2005), and Commerce21 Corporation (acquired in 2004). In 2007, he co-founded Studio Ousia. His dream is to become a samurai one day.

Ikuya Yamada

Co-founder, CTO / Ph.D.

Ikuya is a serial entrepreneur and has been a software engineer since he was in junior high school. Previously he was the CTO of Fractalist, a public mobile software company. While he was in college, he founded Newrong, where he led several governmental projects. He developed an innovative P2P middleware which eventually came to be used by several established Japanese manufacturers. He is also a Senior Visiting Researcher at Keio Research Institute at SFC.

Michiko Sakamoto


Michiko specializes in business development in the high technology industry. She probably loves to live in this space from the moment she was given an Apple II as a kid and later studied computer science for an elective at college. After working for Development Bank of Japan where she was in charge of project finance, she worked for Booz, Allen and BCG as a management consultant for high tech companies. Later she worked for NetService Ventures Group in Silicon Valley. She coincidentally bumped into Studio Ousia in 2015 and has been fascinated by its technology ever since.

Tomotaka Ito

Software Engineer

As a teenager, Tomotaka got interested in how interactive web pages should be constructed. He has been programming since junior high school. While at university and graduate school, he did research projects in middleware for intuitive controls and service integration in the field of ubiquitous computing. At Phroni, he spearheaded the implementation of server-side systems. His hobbies include visiting hot springs, driving, and watching movies.

Ayae Hirata

Marketing Director

While attending university, Ayae focused on public relations work for non-profit organizations and social ventures. She joined Studio Ousia wanting to help innovate the world through her novel ideas and vision. One of her hobbies is reading -- Her favorite authors are Gabriel García Márquez, Victor Hugo, J. M. G. Le Clézio and J. R. R. Tolkien.

Naoya Tozuka

Software Engineer

Naoya has started software programming at the age of 10. He majored in Tibetan Studies in Kyoto University. He joined Studio Ousia in 2012 after working for a DTP company and also co-founding a startup. He likes programming competitions. He has the credentials of the primary degree of a French language proficiency test and also is a professional translator of French.

Sonse Shimaoka

Software Engineer

Sonse majored in NLP during college and graduate school from the curiosity for artificial intelligence. His research included named entity classification using Wikipedia. He received awards from academic conferences both in Japan and outside the country during graduate school.After working for a recruiting service congramarate, he joined Studio Ousia in 2019. He likes gaming, reading and watching films in spare time and also is a big fan of Elon Musk.


Studio Ousia Inc.
Tokyo Studio

4F Otemachi Building, 1-6-1 Otemachi
Chiyoda-ku, Tokyo, JAPAN



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