Built for careful adoption
Japanese companies often ask where AI may act, who remains accountable, and what evidence remains. Naikaku makes those boundaries visible.
Japan-built · Japanese-primary · Cautious AI adoption
A cabinet model for AI work, from Japan.
Naikaku brings planning, coding runners, sandbox execution, critique, supervision, and evidence-based iteration into one governed workbench shaped by Japanese operating requirements.
One mission, multiple roles, reviewable evidence.
Instead of handing work to one unchecked model, Naikaku separates planning, execution, critique, supervision, safety, memory, and scoring. Execution sits behind presets, readiness checks, logs, receipt review, and artifact audit.
From automation and research work
The system is shaped for customer automation needs, research loops, investigation workflows, and engineering checks.
Public source from Japan
EMYSTI is releasing the approach as noncommercial public source so developers can inspect, fork, and contribute.
For AI that can be used carefully.
AI adoption in Japan often has to satisfy legal, information-control, quality, and customer-explanation concerns. Naikaku responds by separating proposal from execution and putting reviewable evidence at the center.
Business automation
Run repetitive work, research, reports, and code checks with scoped permissions and evidence.
Research workflows
Compare model viewpoints, critique, retry, and preserve records in the same workspace.
Engineering teams
Even when an AI runner performs work, receipts and artifact review keep final acceptance explicit.
EMYSTI Hero Series
Naikaku is the thinking and execution layer behind the Hero Series.
VisitHero, TransHero, StayHero, and HanasuHero are not isolated app ideas. Naikaku is the EMYSTI AI workbench that helps separate planning, verification, translation, implementation, and supervision before work reaches people in the field.
Company
EMYSTI LLC
A Japan-based builder connecting AI, multilingual systems, and human dignity.
Field MapVisitHero
Multilingual help that turns uncertainty in Japan into the next practical action.
CommunicationTransHero
Translation as daily infrastructure for healthcare, public offices, and field work.
Life in JapanStayHero
A multilingual community that reduces loneliness and anxiety for life in Japan.
Everyday JapaneseHanasuHero
AI that turns everyday Japanese at home and school into point-reading, translation, and read-aloud support.
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.
Same content structure across languages.
Japanese stays the primary language, while English and Chinese keep matching pages, matching routes, and matching license boundaries.
日本語
The same content structure is available.
English
The same content structure is available.
简体中文
The same content structure is available.
FAQ
What does Naikaku do?
It is an AI cabinet workbench where multiple roles plan, execute, critique, supervise, score, and preserve evidence.
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.