Company

About Citadel AI

Citadel AI is a global startup founded in Japan
that helps enterprises deploy AI safely and responsibly.

Since our founding in 2020, we have built an AI governance platform that supports the entire AI lifecycle, from pre-deployment risk assessments to real-time guardrails in production.

Our technology has been adopted by leading enterprises in Japan and around the world, as well as by international standards and certification bodies, across industries where trust and reliability are critical, including financial services, healthcare, and manufacturing.

Citadel AI collaborates with government partners, including NEDO and AIST, on research to advance AI safety and governance. Through our research, we are developing AI safety evaluation technologies and practical implementation guidelines to help organizations deploy and operate AI safely and responsibly.

Citadel AI is also participating in a research project commissioned by the Cabinet Office of Japan to establish an AI evaluation environment.

Our Mission

Build Trust in AI

As AI becomes increasingly integrated into business and society, trust becomes essential.

Citadel AI is building a “Technical Trust Layer” to evaluate AI quality, manage AI risk, and make the world’s AI systems more reliable and trustworthy.

By bridging rapidly evolving AI with the growing needs of society, we are shaping a future where the full potential of AI can be unlocked safely and with confidence.

Citadel AI - Team

Company Info

Company NameCitadel AI Inc.
Representative DirectorHironori “Rick” Kobayashi
AddressBunkyo, Tokyo
Date of IncorporationDec 10, 2020

Our Investors

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.

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.

Kenny Song

Co-Founder, CTO

Kenny is the Co-Founder and CTO of Citadel AI. He holds a degree in mathematics and computer science from New York University. Previously, he worked at Google Brain as a product manager for machine learning infrastructure, including 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.
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.

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.

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.

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.

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.

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.
Takanori Makihara - Citadel AI
Takanori Makihara

Head of Administration Department

Before joining Citadel AI, Takanori served as the Head of Underwriting Due Diligence at Credit Suisse Securities (Japan) Ltd., where he established the underwriting due diligence department and worked on global offering practices. Prior to his tenure at Credit Suisse, he was at Deloitte Tokyo, where he was involved in IPO audits and advisory services related to the Japan market, London market, Singapore market, and US market. He also worked at Deloitte Canada for 4 years. He is a certified public accountant(Japan) and graduated from Keio University, Faculty of Business and Commerce.