Mirai Guide: planning a day backwards from the thing you want
A wake-up time derived right-to-left from sellout risk, and the historical corpus that calibrates it.
↗Miku research creator · Systems builder · Japan
Building tools, knowledge, and creative experiments for the Miku community.
I’m kari_mikumao. I build WMMD, an MMD runtime and rendering backend, and Mirai Guide, an offline-first companion for Vocaloid events — alongside research into rendering, physics, and durable community knowledge.
Current focus
What I am working on.
- 01 WMMD renderer foundations In production
- 02 Mirai Guide event companion In production
- 03 kari.mikumao.app In production
- 04 Walkable venue navigation from map rasters In research
WMMD / MMD ENGINE
Researching the future of MMD creation—with evidence.
A hostable MMD runtime and rendering backend, layered so the same code can drive an editor, an AR host, or an offline renderer.
Explore the project →- Rust Layered crate workspace
- wgpu Toon, WBOIT, ESM shadows
- Bullet + three alternate physics backends
MIRAI GUIDE / EVENT COMPANION
Still working when the signal inside the hall is not.
A trilingual, offline-first companion for Vocaloid concert events: goods, crowd-reported stock and queues, maps, and a day plan computed backwards from what you want.
Explore the project →- SvelteKit PWA on Cloudflare Workers
- D1 / R2 Reviewed structure, immutable bundles
- JA / EN / ZH Reviewed model translation
Latest notes
Recent writing
Mirai Guide: a globe of where people came from, without tracking anyone
Three separate device identities, ~100 km cells snapped before signing, and a telemetry disclosure that gates the deploy.
↗Mirai Guide: serving an event crowd on one SQLite database
D1 is a single-primary SQLite with a serial write queue. The architecture question was never how to make it faster — it was how to make sure almost nothing ever talks to it.
↗Start here