Isao Kawaguchi / isa130pull

I specialize in Unity mobile game development, from casual game design and implementation to monetization systems and live operations.

1M downloads breaker
Unity Mobile games / apps
AI Conversational virtual humans
Portrait of Isao Kawaguchi
ISAO KAWAGUCHI / GAME ENGINEER & INDEPENDENT MAKER

Selected work / Projects

breaker: Block Breaking

A casual game built around a 30-second block-breaking loop. I led planning and development. The game reached one million downloads, with in-app purchases accounting for 30% of revenue.
Case study / GameBiz coverage (Japanese)

Cocos2d-x

V-Tabi: A Journey Across Japan

A travel adventure game that lets players experience a virtual journey across Japan. I worked on development, product planning, and live operations.
Service ended / Project page (Japanese)

Unity

Velle / SDSali Virtual Human

Implemented LLM prompts, speech recognition and synthesis integrations, and Unity-based character animation.
Details (Japanese)

Unity
AI

MiRRor Interactive Game

A conversational game whose experience changes in response to the player's choices and free-text input. I contributed as a developer and prompt engineer.
YouTube / Details (Japanese)

Unity
AI

Services

I support game and interactive-content development from early concept definition through implementation and live improvements.

Unity mobile development

Product planning, prototyping, feature development, and post-launch improvements for iOS and Android games and apps.

Unity
iOS
Android

Game design and monetization

Accessible gameplay loops, game-balance tuning, and player-centered advertising and in-app purchase design.

Game Design
Monetization

AI and conversational experiences

Interactive experiences combining LLM prompts, speech recognition, speech synthesis, and Unity characters.

LLM
Voice
Virtual Human

Discuss your project →

Independent apps

Browser apps

Mobile apps

Independently planned and developed.

ConCheki

ConCheki app icon

A concafe fan-activity app combining visit stamps, collectible cast avatars, and a cheki memory book.
View details

Flutter
Firebase

Hitokoma

Hitokoma app icon

A face-recognition photo slideshow app that lets users play photos featuring selected people.
View details

SwiftUI
Core ML

SushiBomb

The second casual destruction game, this time about demolishing a conveyor-belt sushi restaurant in 30 seconds.
View details

Unity

Profile

I develop mobile games and apps with Unity, working from early product and game design through implementation.
My recent focus is AI-powered interactive content, including conversational virtual humans.

Career

2024
Joined AiHUB as an independent contractor, planning and developing the Velle / SDSali conversational virtual human project.
2019
Became an independent developer, planning and building casual mobile games with Unity.
2018
Joined Infinite Loop, working on Unity app development and planning, including V-Tabi.
2014
Joined IGNIS and planned and developed casual mobile games, including breaker, which reached one million downloads.
Also worked as a social-game planner from 2016.
2012
Graduated from Gifu University's Faculty of Engineering.
Joined a healthcare systems integrator, working on electronic medical-record terminal replacement and an iPad medical-record viewer.

Media / Writing

Qiita
Eleven technical articles about Unity, iOS, Android, and related development topics (Japanese).
View articles

Contact

Use the project inquiry form for work requests, or reach out through social media for other messages.

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Video