About
Our mission is to enrich your life through music. Music has great power to change our life. We believe that software and social can empower the attractiveness of music more and more.

Since Plusadd, Inc. was established in 2010, we create apps with considring musician's mind deeply. As a result, over 5 million musicians have used Plusadd's apps.

Team
Hiroyuki Koike, CEO and Founder
Hiroyuki Koike works on digital music sheet system and has currently developed some significant applications for it. His business career started as researcher at Sony Corporation in 2000 until 2006. Next, he worked as project manager on image recognition business in Zeta Bridge Corporation. Hiroyuki received a M.S. in Computer Science at Tsukuba University and was selected as the super creator of IPA (Information-technology Promotion Agency, Japan) Exploratory IT Human Resources Project (The MITOH Program).

Ryutaro Ishii, Software engineer
Ryutaro Ishii is computer programmer, and he is studying computer science in University of Electronics and Communication. He worked at startup company in Silicon Valley as internship for 6 weeks. He belongs to piano club. That’s why he can play the keyboard as his hobby. Of course, he can also hit the keyboard as his job.

Takumi Wakabayashi, Software engineer
Takumi Wakabayashi is computer programmer, and he is studying electrical engineering in University of Electronics and Communication. He belongs to piano club as the representative.

Investor / Advisor
Takeshi Natsuno
Gen Miyazawa
Ken Kutaragi