MCP for building Japan-native websites with AI.
Connect Japan to Claude, Cursor or any other MCP client and it stops being a tab you switch to. MCP for building Japan-native websites with AI. The japan mcp server is what makes that connection.
Lead tool: review_jp_ui — the front-end correctness enforcer (run it on any UI, including Western-built, before shipping to Japan).
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
review_jp_ui — Flagship enforcer — scores CSS/markup against the Japanese UI standard (typography, colour, font payload) with JLReq/JIS citations and fixesgenerate_jp_form — Outputs Japanese form markup: 姓/名 order, furigana, 〒 postal auto-fill, 3-field phone, 年月日 datesvalidate_jp_form — Scores a form against JP conventions (0-100) with issues, severity, and code fixesgenerate_jp_placeholder — Returns test data: names in kanji/katakana/romaji, real postal codes, formatted phone numbers, era datessuggest_keigo_level — Converts English UI text to Japanese at the appropriate politeness level for a given business contextscore_japan_readiness — Rates a page across five categories: forms, copy, trust signals, typography, cultural fittransform_for_japan — Rewrites Western markup into Japan-ready markup with a before/after score and per-change explanationscheck_jp_typography — Audits CSS for Japanese typography: font stacks, line-height, kinsoku shori, sizing, paltget_seasonal_context — Returns the current season, active events, 24 microseasons (二十四節気), and launch blackout windowsaudit_japan_ux — Seven-category audit (layout, typography, visual, navigation, trust, content, mobile) with a letter gradedesign_direction_for_japan — Produces a Japan-specific design brief from brand type, audience, and industryTypography — The Typography tool exposed by this serverjapan-ux-mcp on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Japan's toolset — review_jp_ui, generate_jp_form, validate_jp_form and 10 more — is a fair guide to whether it matches your workflow. It is maintained by mrslbt; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| review_jp_ui | **Flagship enforcer** — scores CSS/markup against the Japanese UI standard (typography, colour, font payload) with JLReq/JIS citations and fixes. |
| generate_jp_form | Outputs Japanese form markup: 姓/名 order, furigana, 〒 postal auto-fill, 3-field phone, 年月日 dates. |
| validate_jp_form | Scores a form against JP conventions (0-100) with issues, severity, and code fixes. |
| generate_jp_placeholder | Returns test data: names in kanji/katakana/romaji, real postal codes, formatted phone numbers, era dates. |
| suggest_keigo_level | Converts English UI text to Japanese at the appropriate politeness level for a given business context. |
| score_japan_readiness | Rates a page across five categories: forms, copy, trust signals, typography, cultural fit. |
| transform_for_japan | Rewrites Western markup into Japan-ready markup with a before/after score and per-change explanations. |
| check_jp_typography | Audits CSS for Japanese typography: font stacks, line-height, kinsoku shori, sizing, palt. |
| get_seasonal_context | Returns the current season, active events, 24 microseasons (二十四節気), and launch blackout windows. |
| audit_japan_ux | Seven-category audit (layout, typography, visual, navigation, trust, content, mobile) with a letter grade. |
| design_direction_for_japan | Produces a Japan-specific design brief from brand type, audience, and industry. |
| Typography | The Typography tool exposed by this server. |
| Seasonal | The Seasonal tool exposed by this server. |
{
"mcpServers": {
"japan-ux": {
"command": "npx",
"args": ["-y", "japan-ux-mcp"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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