Board members

Fumiari Mizokawa



He started the career in OPT Inc. in April 2002, developed the expertise in sales, media planning, media buying, as well as the products development of the ad industry.

In 2010, he achieved the expansion of the operating team on the display advertisement and led the expansion of the organization.

In August 2011, he was appointed as an outside board member of Crossfinity Inc. Later in November, he was appointed again as an outside board member of s1o Inc. (Heartlass Inc. at present).

In January 2013, as a director of Crossfinity, Inc., he expanded the company’s performance marketing services. In October 2017 he was appointed as the president because of the excellent achievements and managed the expansion of the company’s business in 3 areas including introducing the new business models.

In October 2019, he was placed as the president of Heartlass, Inc.



Since 2008, he has worked as a media planner at Opt Co., Ltd. in a wide range of areas such as planning, solution selection, and operation. Responsible for project management as an in-house project leader for ad networks and DSPs, systematizing operational know-how, in-house penetration, and promoting various outputs.

After that, he worked as a management member of Heartrath Co., Ltd. after going through the management layer of the operational advertising area. Promoted in-house support business and assumed office as Director CSMO.