Provide Joy and Freedom by Automating the World
ChatBook is a sales acceleration intelligence to power fuel into marketing, inside sales, and sales teams. In 2016, our founder, the only sales person at that time, found herself in a flood of repetitive work. To bring focus back to her creative work, the team built a software to automate sales and marketing. This is the beginning of our story.

What We ♡

What we think important

Make what people want

Our team majority consists of serial entrepreneurs. We know how crucial and fun it is to make something for others.

Run while think

Everyone takes ownership of their job and have power to make decision.

Enjoy Learning

We are the most curious people in the world. Love to explore fresh insights and methods.

Set Goals, Make them Happen Here

YOLO. Think about what you want to be in the future. Let’s start it from here.

Leadership members

ChatBook is comprised of an international and multi-cultural team of entrepreneurs, designers and developers.


Maiko Kojima

Maiko Kojima is the CEO and Founder of Chatbook.  She oversees the product vision, design, development, sales, financing and marketing strategy.  She was accepted to the “APT Women” 4th cohort sponsored by the Tokyo Government. Additionally, she was accepted to present at the NIKKEI AI Summit to talk about the forefront of AI based technology.  Ms. Kojima is self taught engineer and programs in python and objective-c becoming the CTO at Primeagain Inc. She successfully built thirty mobile and web based applications from ideation to product release.  She doubled the application usage year after year to scale to 5 million users. Ms. Kojima graduated from Waseda University with a B.S. in International Politics and Economics.


Yang Fei

Fei Yang is a Co-Founder of ChatBook. Mr. Yang is a full-stack engineer and has overseen and managed world-class web application engineering teams and with a decade of machine learning experience, with an emphasis on customer success. Prior to joining ChatBook, he was a deep learning engineer in a startup that operates a language learning platform using AI.  With the combined experience in machine / deep learning Mr. Yang was was drawn in developing next generation consumer friendly chat apps. He has prior experience working in one of Japan’s largest manufacturing companies. Mr. Yang holds a B.S. from Dalian University of Technology and a M.S. in informatics from Nagoya University.


Michal Stach
Full-Stack Developer
Dalia Daud
Eugene Pyrlog
Akira Nakazawa
Shuichi Kitajima

Job Openings

This is an amazing opportunity to join the founding team of a new startup based in
Tokyo. We are a pre-seed, garage-based group of engineers building Messenger chatbot tools for
businesses for generating more leads and automating their sales pipeline. Remote and relocation benefit included! Are
you ready for your next challenge?
AngelList Wantedly

Corporate Profile

Corporate Name ChatBook, Inc.
Address Koukaidou building 2F 4-2-45 Roppongi , Minato-ku, Tokyo,106-0032, Japan
CEO Maiko Kojima
Investors Salesforce Ventures
East Ventures
YJCapital (affiliate of Yahoo Japan 100%)
MANEX ventures,Inc.(MV Investment Limited Partnership Ⅰ)
MITSUI SUMITOMO INSURANCE Venture Capital Co.,Ltd.(MSIVC2018VInvestment Limited Partnership)
Advisor East Ventures Eto Batara
YJ Capital CEO Shinichiro Hori

ChatBook, Inc.
101 Hachery Shibuya 14-1
Sakuragaokacho, 渋谷区 Tokyo 150-0031

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