Message From CEO

J. Yamamoto

John Yamamoto
President & CEO

28 years of experience in the video game industry.
CEO & President for 26 years

  • DIGITAL Hearts USA Inc. CEO& President 2011 ~
  • Square Enix., Inc. (USA) CEO& President 2007 to 2010
  • Square Enix Ltd. (Europe) 2004 to 2009 CEO& President
  • The additional posts at Square Enix Group
  • SQUARE Enix Holdings (Tokyo stock Exchange 9684) Executive Officer
  • Square Enix, Co., Ltd. (Tokyo Stock Exchange 9684) Corporate Executive
  • Atlus USA (Software)., Inc. CEO& President 1991 to 2004
  • Atlus Co., Ltd. (Head Office in Tokyo) EVP of Consumer Division, Head of Dev. Sales &Marketing, Board of Directors
  • Atlus Dream Entertainment, Inc. (Atlus, Itochu and Sega’s joint corporation) CEO & President, 1998 to 2003

We consider game content very important; developers devote a lot of energy in order to deliver content intended to make users happy. DIGITAL Hearts USA’s mission is to laterally backup developers in delivering high quality game content—free of bugs—to users in a timely manner. We can also help with marketing and sales scheduling so developers can focus on what they do best: creating great gaming experiences.

We strive to provide you the best service so that you can deliver not only bug-free games and digital content but also happiness and joy. We succeed when you succeed, and you succeed when users are happy.

Our brother company, DIGITAL Hearts Co., Ltd., was founded by Eiichi Miyazawa, Chairman of Hearts United Group Co.Ltd. in 2001 as a professional group to market “finished products as the producers intended.” This is ensured through DIGITAL Hearts USA and our nine group companies situated around the world. As well as quality assurance, we seek to expand our business by entering into related, yet diverse business fields.

The name DIGITAL Hearts derives from the phrase “heart to heart.” Despite our society becoming ever more overrun with technology, we attach great importance to “heartfelt feelings”—namely, customer satisfaction and the ability to form both fruitful and lasting relationships with our clients. DIGITAL Hearts is here to help its clients to take those “feelings” and pass them onto end users.


  • All staff are subject to NDA
  • Document disposal handled by accredited agency
  • Glass break alarm system
  • 5-tier lock system
  • Constant video monitoring

Service Policy

Quality First – At DIGITAL Hearts, everything we do is based on ensuring that our client’s experience working with us is as streamlined and efficient as possible. The goal of each our testing teams, be it functionality, compliance, or localization, is to make our clients confident that their needs are being met and that they can rely on us in the future.

Always Professional – In our business, first impressions are important, but lasting impressions are everything. We strive to maintain the utmost respect and integrity in all interactions with our clients, colleagues, and business partners. The conduct of each DIGITAL Hearts employee reflects upon the reputation of our entire company.

Think Globally – With established branches throughout Japan, Korea, and the United States, we are able to provide a wide range of services for our clients, local and overseas alike.

Company Profile

Company Name DIGITAL Hearts USA Inc.
Founded October 2011
Members of the Board John Yamamoto
Seigo Harada
Terunobu Edanami
  • Game Testing
  • Worldwide Rating Submissions
  • Marketing Research


Office 21250 Hawthorne Blvd. Suite 700 Torrance, CA 90503
TEL: +1-310-792-7450

Group Companies

Location 41F Tokyo Opera City Bldg., 3-20-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-1441, Japan
TEL +81-3-3373-0082
Established October 1, 2013
President & CEO Genichi Tamatsuka
Business Fields Management and administration of subsidiaries, etc. and businesses incidental or related thereto
DHJ logo small
Company Name DIGITAL Hearts Co., Ltd.
Location 41F Tokyo Opera City Bldg., 3-20-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-1441, Japan
TEL +81-3-3379-2053
Established April 19th, 2001
President Genichi Tamatsuka
Business Fields Comprehensive debugging services
(*General worker dispatching undertakings: general 13-07-0485)


Company Name Aetas, Inc.
Location Tokyo Tatemono Kyobashi Bldg. 5F, 3-6-18Kyobashi, Chuoku,
Tokyo, 104-0031,Japan
Established December 2005
President Kazuhisa Okada
Business Fields Planning and management of PC online game information site “”, etc.
Company Name FLAME Hearts Co.,Ltd.
Daiwa Azabu Terrace Bldg. B1F, 3-20-1 Minami Azabu, Minato-ku, Tokyo 106-0047, Japan
TEL +81-3-6866-7281
Established January 2016
President President&CEO Masanobu Hayashi
Business Fields Game development and CG content development
*On January 1, 2016, Premium Agency Inc., G&D Co., Ltd. and DIGITAL Hearts Visual Co., Ltd., have merged into a single company and changed its company name to FLAME Hearts Co.,Ltd.
*The Group implemented an absorption-type merger, effective on February 1, 2017, with FLAME Hearts Co., Ltd. as the surviving company and PG Universe Co., Ltd., as the absorbed
Company Name DIGITAL Hearts (Shanghai) Co., Ltd.
Location Rm 203,Building2, No.958 Zhenbei Road,Putuo,Shanghai 200333,China
TEL +81-3-6406-0082
Established July 2016
President & CEO Jun Yamamoto
Business Fields Comprehensive Debugging Services, etc.