Built for careful adoption
Companies want to know what the AI may do, who is responsible, and what record is kept. Naikaku keeps the decision before and the record after.
Japan-built · Japanese-primary · Cautious AI adoption
A cabinet model for AI work, from Japan.
Naikaku is a workbench for handing work to AI with separate roles: one plans, one does the work, others check it. Everything it did, and what came of it, can be reviewed afterwards.
One job, split across roles.
No single AI gets the whole job. Planning, doing, critique, supervision, safety checks, memory and scoring are separate roles. Work only runs after the setup is checked, and people can review the logs and results afterwards.
From automation and research work
Made for business automation, repeated research and investigation work, and code checks.
Public source from Japan
EMYSTI has published the way it works as noncommercial public source, so anyone can read it, fork it and contribute.
For companies that need to be careful.
You want to use AI, but legal, data handling, quality and explaining things to customers make you careful. Naikaku keeps AI suggestions separate from actions and leaves a record people can check.
Business automation
Run routine tasks, research, reports and code checks, only within what you allow, with a record kept.
Research workflows
See several AIs' opinions, critiques, retries and records on one screen.
Engineering teams
Even when AI does the work, a person decides whether to accept it after looking at the log and the results.
EMYSTI Hero Series
Naikaku is the tool we use to build the Hero Series.
We use Naikaku to keep planning, checking, translation, building and supervision separate when we work on VisitHero, TransHero, StayHero and HanasuHero.
Company
EMYSTI LLC
A Japanese company using AI and languages to take the hassle out of daily life.
Field MapVisitHero
A multilingual app that answers "what now?" on a trip in Japan with a map and a next step.
CommunicationTransHero
An app that interprets conversations at hospitals, city hall and service counters.
Life in JapanStayHero
A multilingual community where foreigners living in Japan can ask each other for help.
Everyday JapaneseHanasuHero
An app that lets you point at Japanese you see at home or school to translate it or hear it read aloud.
The shortest path to try the public preview.
Start locally, check provider aliases and the gateway, then attach runner presets only when you need them. Raw API keys should stay out of browser storage.
1
Download
Get the macOS developer preview from GitHub Releases.
2Run locally
Use npm ci and npm run dev to open the Workbench.
Gateway
Run npm run gateway for local provider and runner routes.
Provider
Configure provider, endpoint, model, and API-key alias per role.
5Runner
Allow only the CLI runners you choose, with evidence required.
Choose by intent.
Try it, connect APIs, supervise a Mac runner, or contribute. Each entry point keeps the same language structure.
Download
Run steps, verification commands, and checksums.
API Gateway
Bring-your-own keys and future hosted gateway.
Runners
Boundaries for CLIs and Mac automation.
Use cases
Pick the entry point by intent.
Developers
Contributions, adapters, and verification.
License
Noncommercial source and commercial permission.
Read it in Japanese, English or Chinese.
Japanese comes first, but English and Chinese have the same content and the same page layout.
日本語
Same content.
English
Same content.
简体中文
Same content.
FAQ
What does Naikaku do?
A workbench where several AIs split the work: planning, doing, critique, supervision and scoring. What they do is kept on record.
Can I use my own API keys?
Yes. Each role can use its own provider, endpoint, model, and API-key alias.
Can I use it commercially?
The public release is for noncommercial use. SaaS, client delivery, commercial modification, and paid integration require written permission from EMYSTI LLC.