Free Anniversary Visual Novel "An Encounter on August 9" Celebrates One Year of Tamanchu!
A short adventure game marking the series’ first anniversary is now available—no download required, playable free in your browser.
Experiences that move people.
89PRODUCE Inc. — Entertainment planning, development & production
Summer is coming back———
OUR CRAFT IP PROJECT
A coming-of-age baseball story set in Okinawa, grown together with fans. Explore the world and characters on the Tamanchu! official site.
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News
Tamanchu! National Summer Book Report Contest 2026
To celebrate the first anniversary of Tamanchu!, we are holding a book report contest from August 9 through August 31.
The official Tamanchu! website is now live
A new official site introducing the world of our Craft IP, Tamanchu!, has opened.
About Us
Experiences that move people.
We turn emotion into entertainment.
89PRODUCE Inc. is a Tokyo-based production company built around one idea: delivering experiences that move people. We plan, develop and produce entertainment content across games, video, music and events.
On the original IP side, we develop "Craft IP" — stories nurtured together with fans, such as the novel project Tamanchu! — and operate Quest Board.JP, a multilingual media site delivering Japan's gaming news to the world.
We also work as an external producer for partner companies, supporting projects from planning and team building through development and live operation. For producing, consulting or creative support, feel free to reach out.
FOUNDER
山口修平Shuhei Yamaguchi — "Yamaguchi-P"
Founder & CEO / Game & IP Producer
A game and IP producer formerly with Square Enix and Akatsuki. He is the original creator of Hachigatsu no Cinderella Nine (Hachinai), guiding its media-mix expansion into anime, live-action drama and live concerts. He has also worked on the original IP Tribe Nine as well as titles from nationally beloved major franchises, with several of the titles he led reaching #1 on the sales charts. Today he leads 89PRODUCE as original creator and producer of Tamanchu!, and has co-founded the doujin circle Neoneon Tribe together with Kazutaka Kodaka and others.
Works
Tamanchu!
A story of Okinawan girls chasing Koshien — the summer we can't forget.
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Quest Board.JP
A game media site delivering Japan's gaming news to the world.
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Neoneon Tribe
A non-profit dōjin circle continuing the untold story of TRIBE NINE.
View Project →
New Project
New projects always in the works. Producing, consulting, support — talk to us.
Contact Us →Company Info.
- Company Name
- 89PRODUCE Inc.
- Address
- Mitsuhashi Bldg. 3F, 1-3-3 Kita-Aoyama, Minato-ku, Tokyo 107-0061, Japan
- Representative
- Shuhei Yamaguchi, CEO
- Established
- Founded May 23, 2025
- Capital
- Capital: ¥1,000,000
- Business Activities
- Planning, development, production, operation and sales of entertainment content utilizing games, applications and conversational AI
- Planning, creation, production and distribution of video, music, publications and content for social media, YouTube and other platforms, including campaign management
- Planning, production, operation and management of events, exhibitions, lectures, seminars, cafés, restaurants and retail stores
- Planning, production, operation and consulting for tourism, regional revitalization and community development
- Planning, production, agency services, operation and consulting related to advertising, promotion, marketing and information services
- Investment in and capital participation in startups, management support, and the planning, production, operation and consulting of incubation programs
- Market research, data collection and analysis, and related consulting services
- All businesses incidental or related to the foregoing
Contact
For project production, consulting, creative support and other inquiries, please get in touch.