yousan

Unity × Voice × AI Characters

I build Japanese speech AI and the characters and games that use it — on-device Japanese TTS, voice dialogue, and Unity integration.

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Speech AI

Japanese TTS, G2P and pitch accent, speech-to-speech dialogue, and on-device inference — from model training to Unity / C# integration.

kodama-ja-streaming-small

A Japanese streaming ASR model adapted from the English streaming model moonshine-streaming-small.

  • ASR
  • Streaming
  • ONNX
  • ReazonSpeech

piper-plus / uPiper

piper-plus, a lightweight Japanese-capable TTS, and uPiper, a library for using it from Unity.

  • GitHub ★ 217
  • TTS
  • ONNX
  • Unity
  • C#

AI Characters

AI characters that combine voice dialogue with character expression, such as desktop mascots and conversational apps.

uDesktopMascot

An open-source, user-customizable desktop mascot.

  • GitHub ★ 353
  • Unity
  • C#
  • LLMUnity
  • GitHub Actions

AI × Game Development

Game development in Unity and games and prototypes with generative AI built in. Organizer of a generative AI exhibition.

Oblivion Maiden

An exploration adventure set in a hidden magical academy, where I joined as PM / director.

  • Steam

Geranium

An ADV game set in a flower shop where you make bouquets (July to November 2023).

  • Unity
  • easy-adv
  • Fungus

Tools & Community

Libraries for Unity, development infrastructure, and community work.

uni-master-linker

A library that makes Google Sheets master data easy to use in Unity.

  • GitHub ★ 12
  • Unity
  • C#
  • Google Sheets

easy-adv

A library that makes building ADV games in Unity easier with Fungus and Google Sheets.

  • GitHub ★ 3
  • Unity
  • Fungus
  • Google Sheets

Open work

630GitHub stars (own repositories)
429Public GitHub repositories
77Hugging Face models
45Hugging Face datasets

As of 2026-09-29

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