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 software engineer and a researcher working on natural language processing and machine learning. Previously he served as a director of Fractalist, which was a public mobile software company located in Tokyo. While he was in college, he founded Newrong, a software company acquired by Fractalist. He won several competitions held with top international conferences including WWW, ACL, NAACL, and NIPS. He received his Ph.D. from Keio University. He is also a visiting scientist at the RIKEN Center for Advanced Intelligence Project.

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. 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.

Ryuji Tamaki

Software Engineer

Gaining interest in machine learning at graduate school, researched question answering and dialogue modeling. Participated in competition hosted by NIPS as an intern at Studio Ousia. After gaining his masters, joined Studio Ousia prior to working at a human resource management company. He likes to spend his free time weight training and viewing Kaggle Kernels and Discussions.

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.

Takuya Yoshinaga

Software Engineer

Playing on the computer from elementary school, he turned his passion into research from university. In graduate school, he researched information retrieval methods. He is also interested in Anime, games and movies. He is recently into competitive programing. Fluent in Chinese.

Satoshi Taniguchi

Sales Director

BA in Policy studies from Keio University. Started 3 companies in Ed-tech field. Joined Studio Ousia to accelerate use of AI for better knowledge/information utilization. Does research and development of clinical apps for diabetes patients.

Liyuan Xu

Research Intern

Liyuan is a member of Sugiyama-Sato-Honda Lab at the University of Tokyo. He is interested in theoretical machine learning, including the multi-armed bandit problem. He loves to watch videos of game playing on Youtube and plays board games such as Japanese chess.

Jin Sakuma

Research Intern

Jin became interested in mathematics and programming at his early teenage. He started living in the US at the age of 15 and graduated from the University of Michigan - Flint at 20. Currently, he is a Ph.D. candidate at Yoshinaga Lab. in the University of Tokyo, with a research interest of NLP, especially in multilingual models. He has the license of scuba diving.

Daisuke Oba

Research Intern

Daisuke is a master course student at Toyoda-Yoshinaga-Kitsuregawa Lab. at The University of Tokyo, Japan. He is currently doing researches on natural language processing, especially personalized NLP systems and meaning representations. He enjoys skiing, playing golf, watching sports, and drinking craft beer.

Tatsuya Aoki

Research Intern

Tatsuya is a 2nd-year PhD student at Okumura-Takamura laboratory in Tokyo Institute of Technology. His research interest lies in representation learning applied to word sense disambiguation. He previously worked at IBM Research, Apple Inc. and the University of Melbourne as an intern. A fun fact about him is that he has stayed at a mountain for a month as he loves to play snowboarding.


Studio Ousia Inc.
Tokyo Studio

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



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