Company name
Coursebase, Inc.

March 26, 2012

Hideyoshi Kuroda
Kosuke Kuroda

VORT Gaienmae III, 7F
3-42-2 Jingumae
Shibuya-ku, Tokyo 150-0001



John Hideyoshi Martyn photo

John Martyn (Hideyoshi Kuroda)

Co-CEO / Co-founder

John co-founded Coursebase with his brother Billy and childhood friend Franky. John leads Coursebase’s sales and partnerships. Before co-founding Coursebase, John worked at asset management firm BlackRock in New York where he managed sales and relationships with Japanese institutional clients. John studied abroad at Sophia University in 2006 and graduated from George Mason University in 2007 with a B.A. in Global Affairs. John is bilingual in English and Japanese.

Billy Kosuke Martyn photo

Billy Martyn (Kosuke Kuroda)

Co-CEO / Co-founder

Billy co-founded Coursebase with his brother John and childhood friend Franky. Billy leads Coursebase’s UI/UX design, product management and business operations. Before co-founding Coursebase, Billy worked at investment bank Credit Suisse and at financial data firm Bloomberg in Tokyo where he led the Futures & Options desk in Asia. Billy studied abroad at Kyoto University in 2007 and graduated from the University of Virginia in 2008 with a B.A. in Foreign Affairs and Japanese Language and Literature. Billy is bilingual in English and Japanese.

Franky Chung photo

Frank Chung

CTO / Co-founder

Frank co-founded Coursebase with his childhood friends Billy and John. Frank leads Coursebase’s engineering. Before co-founding Coursebase, Frank worked at Deloitte Consulting in Washington D.C. where he led several systems integration projects for government clients. Franky graduated from the University of Virginia in 2009 with a B.S. in Information Technology and Finance.




PERSOL HOLDINGS is one of Japan’s leading HR services companies and provides a wide range of services in Japan and across Asia including recruiting, temporary staffing and consulting. Through its corporate venture capital fund PERSOL INNOVATION FUND, PERSOL HOLDINGS invests in innovative companies with technologies and/or services in the HR domain.

Digital Garage


Digital Garage is Japan’s leading startup incubation and investment firm. Founded in 1995 by internet pioneers Kaoru Hayashi and Joi Ito, Digital Garage has been early investors in many successful startups including Twitter and Path. The firm is headquartered in Tokyo and has an office in San Francisco.

500 Startups

Silicon Valley

500 Startups is a Silicon Valley seed fund and startup accelerator. With a global network of hundreds of experienced startup mentors, a creative working space in the heart of Silicon Valley, and a vibrant community of startup founders, the 500 Startups network is taking the world by storm.

CyberAgent Capital


CyberAgent Capital is a leading early stage venture capital firm based in Tokyo with offices in China, Taiwan, Korea, Vietnam, and Indonesia. Founded in 2006, CyberAgent Capital was an early investor in Japanese social network Mixi and Chinese video-sharing service Tudou.com.

Sunbridge Global Ventures


Sunbridge Global Ventures is a seed fund and startup accelerator focused on investing in Japanese startups with global potential. Headquartered in Tokyo, the firm also has offices in Osaka and Silicon Valley.


PERSOL HOLDINGS and Digital Garage invest in Coursebase

HR services company PERSOL HOLDINGS CO., LTD. (Headquartered in Tokyo, Japan, President and CEO: Masamichi Mizuta) and internet technology company Digital Garage, Inc. (Headquartered in Tokyo, Japan, President and CEO: Kaoru Hayashi) made an equity investment in Learning Management System (LMS) provider Coursebase, Inc. (Headquartered in Tokyo, Japan, Co-CEO: John Hideyoshi Martyn, Billy Kosuke Martyn). The investment was made through the corporate venture capital funds PERSOL INNOVATION FUND LLC and DG Incubation, Inc.

Press release of PERSOL HOLDINGS:


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