natural-japanese
仕事の日本語を、読みやすくわかりやすく書く・直すための Agent Skill です。
No outside reports on file
Use this skill only with non-sensitive Japanese text, as your documents will be sent to external AI systems with unclear privacy protections.
Based on public adoption and transparency signals as of Oct 21, 2026. Our opinion, not a code audit or security guarantee.
What it can access
- Local filesNo local folder access notedLOW
- Command executionNo shell command runner notedLOW
- Network reachConnects to outside service APINOTED
- CredentialsNo API token requiredLOW
- Package sourceGitHub (coji/natural-japanese)PUBLIC
Inferred from this listing’s public package details and description. Check the project’s source before installing.
Install
No npm or PyPI package is listed. Install from source: github.com/coji/natural-japanese ↗
Everything known
We found nothing about this project in the sources we read (last checked 2026-10-30). That does not mean it has no problems.
0 incidents · 0 advisories · 0 news articles · 0 community threads · checked 2026-10-30
Popularity grade: C (from public signals such as stars and downloads, not a code review). Graded 2026-10-21.
Sources we read: OSV, GitHub Advisory Database, CISA Known Exploited Vulnerabilities, 44 security news feeds and our incident library. Last checked 2026-10-30.
About Natural Japanese
This is an AI agent skill that helps rewrite and fix Japanese business writing to make it clearer and easier to read. It appears to focus on improving professional Japanese documents and communications.
Who it’s for
People who write Japanese documents at work and want an AI tool to help polish their writing. This includes professionals in Japan or international companies using Japanese.
Alternatives
- Google Docs built-in writing suggestions (for Japanese)
- Grammarly (supports Japanese, but similar privacy considerations)
- Natsume (Japanese text improvement tool; verify privacy first)
- Local AI models like Ollama with Japanese language support
Setup
Check these steps against the project’s own instructions before running anything.
Follow the project's README for setup instructions. The project is available at the GitHub repository listed, but specific installation steps should be verified in the project documentation.
Why this grade
Signal-based grade (3/7 points): well starred on GitHub, public source code. This reflects adoption and transparency, not a code review.
Popularity and upkeep
- GitHub stars
- 2k
- Listing last refreshed
- 2026-10-29
These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.
Risks to watch for
- Language model access: The skill sends your Japanese text to an AI model, which means your business writing could be processed by external systems
- Sensitive data exposure: Business documents may contain confidential company information, employee names, or internal strategies that get processed externally
- No content filtering: The tool may not distinguish between public and confidential text, treating all submissions the same way
- Unclear data handling: It's unknown how long text is stored, who can access it, or whether it's used to train future models
- Prompt injection risk: Malicious Japanese text could potentially manipulate the AI's behavior or cause it to leak information from other documents
How to lower the risk
Least-privilege permissions
- Only give this skill access to non-confidential documents
- Remove names, dates, and specific numbers before processing
Network isolation
- Ensure it only connects to the intended AI service
- Monitor outgoing connections to verify data destinations
Monitoring
- Log which documents are processed and when
- Review the processed output for unexpected changes or leaks
Red flags to watch for
- Text being processed slower than expected (may indicate logging)
- Unusual AI responses that seem to know too much context
- Documents appearing in public datasets later
Questions
How do I install Natural Japanese?
Natural Japanese does not publish a standalone npm or PyPI package. Clone or follow the setup instructions in its source repository at github.com/coji/natural-japanese.
Are there security reports about Natural Japanese?
No reports found for this package in our research (last checked 2026-10-30). Natural Japanese currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Key risk areas to watch include language model access, sensitive data exposure, no content filtering.
Is Natural Japanese actively maintained?
Natural Japanese has 2k GitHub stars. Our directory data was last refreshed on 2026-10-29. Check recent commit activity, release tags, and open issues at github.com/coji/natural-japanese before pinning it in production.
What are alternatives to Natural Japanese?
Compare Natural Japanese side by side with similar skills in the Related tools section on this page, or browse all skills on AgentArmorHQ.
README badge and team notes
Maintain or use Natural Japanese? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.
GitHub README Markdown:
[](https://agentarmorhq.com/skills/coji-natural-japanese)HTML embed:
<a href="https://agentarmorhq.com/skills/coji-natural-japanese"><img src="https://agentarmorhq.com/api/badge/coji-natural-japanese" alt="AgentArmorHQ Risk Grade for Natural Japanese" height="20" /></a>Terminal check:
curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "coji-natural-japanese"Share with your security lead
Need sign-off to use natural-japanese? Copy this note for Slack, a ticket or a pull request.
### AgentArmorHQ Security Review Memo: natural-japanese
- **Listing URL:** https://agentarmorhq.com/skills/coji-natural-japanese
- **Type:** AI agent skill
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 2k GitHub stars
#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Connects to outside service API
- **Credentials:** No API token required
- **Package source:** GitHub (coji/natural-japanese)
#### Recommended Hardened Setup
- **Source Repo:** https://github.com/coji/natural-japanese
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.
_Based on public adoption and transparency signals as of Oct 21, 2026. Our opinion, not a code audit or security guarantee._Key facts
- Type
- AI agent skill
- Publisher
- coji
- Source code
- github.com/coji/natural-japanese
- Est. context load
- ~50 tokens idle · ~450 tokens when active (on-demand skill)
- Popularity
- 2k GitHub stars
- Last updated
- 2026-10-29
- Last graded
- 2026-10-21
Community
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