Japan Business Day
by Rira365 · remote · no sign-in to list tools · v1.0.0 · published by GitHub user Rira365
Japan business days & holidays (official Cabinet Office data). Free tool + x402 USDC paid tools.
Final · 1Changes · 8
11 tools: 1 do something that can't be undone, 8 change things and 2 only read.
Scanned Oct 21, 2026
- Deletes or cancels0Claude Code: deny
- Can't be undone1Claude Code: ask: see these tools
- Changes things8Claude Code: ask: see these tools
- Only reads2Claude Code: allow: see these tools
No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.
claude mcp add --transport http japan-business-day https://japan-business-day-api.matchan962.workers.dev/mcpTools
Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.
11 tools
Can't be undone 1Claude Code: ask
payment_due_dateJapanese payment terms (shimebi/shiharaibi) calculator, e.g.No findings
Why it is in this group
- The name "payment_due_date" says "payment": a word that usually means money moves, which cannot be taken back.
Description, as the server wrote it Japanese payment terms (shimebi/shiharaibi) calculator, e.g. month-end close paid end of next month; shifts to the previous/next business day on weekends/holidays. Price: $0.01 USDC via x402.
Changes things 8Claude Code: ask
add_business_daysAdd or subtract N Japanese business days from a date (settlement T+N, delivery ETA).No findings
Why it is in this group
- The name "add_business_days" says "add": a word for a change.
Description, as the server wrote it Add or subtract N Japanese business days from a date (settlement T+N, delivery ETA). Price: $0.01 USDC via x402.
bank_value_dateWhen will a Japanese bank transfer be credited?No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it When will a Japanese bank transfer be credited? Returns the value date under standard processing (same day before the cutoff, default 15:00 JST, on a bank business day; otherwise next bank business day). Price: $0.01 USDC via x402.
is_business_dayCheck whether a date is a business day in Japan (official Cabinet Office holiday data).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Check whether a date is a business day in Japan (official Cabinet Office holiday data). Returns holiday name (JA/EN) and next/previous business day. Price: $0.005 USDC via x402.
is_business_day_freeFREE: check whether a date between today and 90 days ahead (JST) is a business day in Japan.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it FREE: check whether a date between today and 90 days ahead (JST) is a business day in Japan. Official Cabinet Office holiday data, supports bank calendar (Dec 31 - Jan 3). For other dates, business-day arithmetic or holiday lists use the paid tools.
japanese_koyomiJapanese traditional calendar for a date: rokuyo (taian/butsumetsu lucky days), Reiwa era date, lunisolar date, 24 solar terms.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Japanese traditional calendar for a date: rokuyo (taian/butsumetsu lucky days), Reiwa era date, lunisolar date, 24 solar terms. Price: $0.005 USDC via x402.
jpx_record_dateJapanese stocks: last cum-rights trading day and ex-rights date for a dividend/benefit record date (T+2 settlement, holiday-aware).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Japanese stocks: last cum-rights trading day and ex-rights date for a dividend/benefit record date (T+2 settlement, holiday-aware). Price: $0.01 USDC via x402.
jpx_sq_dateNikkei 225 futures/options SQ day and last trading day for a contract month (2nd Friday, moved earlier on holidays).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Nikkei 225 futures/options SQ day and last trading day for a contract month (2nd Friday, moved earlier on holidays). Price: $0.01 USDC via x402.
jpx_trading_dayIs the Tokyo Stock Exchange (JPX) open on a date?No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Is the Tokyo Stock Exchange (JPX) open on a date? Next/previous trading day, first/last trading day of the year. Price: $0.005 USDC via x402.
Only reads 2Claude Code: allow
find_lucky_days_japanFind auspicious Japanese dates: days in a range matching rokuyo (e.g.No findings
Why it is in this group
- The name "find_lucky_days_japan" says "find": a word for reading.
Description, as the server wrote it Find auspicious Japanese dates: days in a range matching rokuyo (e.g. taian) and optional weekdays (e.g. sat,sun) for weddings, moving, contracts. Price: $0.01 USDC via x402.
list_holidaysList Japanese national holidays for a year with JA/EN names.No findings
Why it is in this group
- The name "list_holidays" says "list": a word for reading.
Description, as the server wrote it List Japanese national holidays for a year with JA/EN names. Price: $0.01 USDC via x402.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http japan-business-day https://japan-business-day-api.matchan962.workers.dev/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__japan-business-day__list_holidays",
"mcp__japan-business-day__find_lucky_days_japan"
],
"ask": [
"mcp__japan-business-day__is_business_day_free",
"mcp__japan-business-day__is_business_day",
"mcp__japan-business-day__add_business_days",
"mcp__japan-business-day__payment_due_date",
"mcp__japan-business-day__bank_value_date",
"mcp__japan-business-day__jpx_trading_day",
"mcp__japan-business-day__jpx_record_date",
"mcp__japan-business-day__jpx_sq_date",
"mcp__japan-business-day__japanese_koyomi"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as japan-business-day. Review it before you use it.