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About

Company Info

Company Name: Citadel AI Inc.

Representative Director: Hironori “Rick” Kobayashi

Address: Shibuya, Tokyo

Date of Incorporation: Dec 10, 2020

Our Investors

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Get in Touch

Interested in a product demo or discussing how Citadel AI can improve your AI quality? Please reach out to us here or by email.

citadel AI - Rick Kobayashi
Hironori "Rick" Kobayashi

Co-Founder, CEO

Rick holds a degree in electronic engineering from The University of Tokyo. Later, he joined Mitsubishi Corporation and served the President of Loyalty Marketing, Inc., which is famous for the coalition program called Ponta, SVP of Mitsubishi Corporation (Americas), and CEO of Indiana Packers Corporation in U.S. He has outstanding management skills and extensive industry knowledge ranging from IT to medical, retail and food industries.

citadel AI - Kenny Song
Kenny Song

Co-Founder, CTO

Kenny holds a degree in mathematics and computer science from New York University Shanghai, and published research in reinforcement learning. Previously, he worked as a product manager at Google Brain for machine learning infrastructure, such as TensorFlow and AutoML. Kenny was also a research scholar at The University of Tokyo for adversarial machine learning, and sold his previous startup, RoadWatch, to the Abu Dhabi government.

citadel AI - Takehito Matsuba
Takehito Matsuba

COO

Previously, Takehito led the launch of Google Health’s Japan business and the first joint research project on AI-assisted breast cancer screening with a leading cancer hospital in Japan. Prior to Google, he worked with Mitsubishi Corporation where he led investments, M&A, and new business development in the healthcare industry, and served as Director of North American Healthcare Business in the Bay area. He obtained an MBA from MIT Sloan School of Management.

citadel AI - Asei Sugiyama
Asei Sugiyama

Software Engineer

Previously, Asei has worked on engineering production machine learning systems, in particular building ML pipelines. Additionally, Asei is a co-author of “Machine Learning Illustrated” (機械学習図鑑), and a contributor to open source ML libraries such as Kubeflow Pipelines and TFX.

citadel AI - Arseniy Aseev
Arseniy Aseev

Software Engineer

Previously, Arseniy worked at Paidy, Japan’s largest fintech startup (acquired by PayPal), designing and engineering their internal MLOps systems and workflows. He graduated with a degree in Computer Science from Yokohama National University, as a MEXT scholar, and conducted research on the security of Ethereum smart contracts.

citadel AI - Yosuke Higashi
Yosuke Higashi

Software Engineer

Previously, Yosuke worked at Waymo (f.k.a the Google Self-Driving Car Project) as a Senior Software Engineer on the Planner team, where he focused on implementing AI decision making systems as well as evaluating their performance. He graduated from Swarthmore College with a double major in Engineering and Computer Science.
citadel AI - Koki Ryu
Koki Ryu

Software Engineer

After graduating from the University of Tokyo’s Department of Information Science, Koki joined Google as a software engineer. His main work involved improving the performance of virtual machines on Chrome OS. In addition, Koki has also built software at Microsoft, Apple, and Cookpad.

citadel AI - Hoang Nguyen
Hoang Nguyen

Software Engineer

Previously, Hoang worked at Carousell, one of the largest secondhand marketplaces, where he built ML models for different domains such as computer vision, natural language and recommendation system. He graduated from National University of Singapore with a degree in Computer Science.

citadel AI - Federico Garcia
Federico Garcia

Software Engineer

Federico holds a degree in Computer Science from the University of Granada. He started as a Frontend Developer in a small video-game company in Kyoto and then worked for Apple
in Yokohama, where he focused on data visualization.

citadel AI - Emma Zhang
Emma Zhang

Software Engineer

Previously, Emma worked at Amazon (US and Japan) and Stripe (Japan) as a software engineer, on varies projects and platforms from backend systems to customer facing features. She graduated from University of Florida with a M.S. degree in computer engineering and minor in computer science.