Japan Business Day

io.github.Rira365Published by GitHub account Rira365v1.0.0Updated Oct 24, 2026

Japan business days & holidays (official Cabinet Office data). Free tool + x402 USDC paid tools.

VerifiedStreamable HTTPWeb executableProductivity & WorkflowFinance

Overview

AI-generated overview

Lets an assistant look up Japanese business days and public holidays based on official Cabinet Office data.

What you can do
This remote MCP server provides Japanese business-day and holiday information drawn from official Cabinet Office data. It offers a free tool plus additional tools that are described as paid via x402 USDC. No tool list is published in the registry entry, so the exact tool names and parameters are not documented here.
When to use it
Useful when an assistant needs to check whether a date is a Japanese business day or holiday, for example when scheduling, planning deadlines, or calculating working days in a Japan-related workflow.
Requirements
A remote streamable HTTP endpoint; no package installation, environment variables, or headers are declared. The paid tools involve x402 USDC payment, which implies a compatible wallet or payment setup, though details are not documented.
Before you install
Some tools are described as paid in USDC via x402, so using them may spend funds; the payment flow and any wallet credentials are not documented in the registry entry. The free tool's data source is stated as official Cabinet Office data, but no accuracy or update guarantees are given.

Installation

In SourceWeft

  1. Open Japan Business Day in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.Rira365%2Fjapan-business-day/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "japan-business-day": {
      "type": "http",
      "url": "https://japan-business-day-api.matchan962.workers.dev/mcp"
    }
  }
}

Tools

11

is_business_day_free

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.

Parametersdaterequiredcalendar

is_business_day

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.

Parametersdaterequiredcalendar

add_business_days

Add or subtract N Japanese business days from a date (settlement T+N, delivery ETA). Price: $0.01 USDC via x402.

Parametersdaterequireddaysrequiredcalendar

list_holidays

List Japanese national holidays for a year with JA/EN names. Price: $0.01 USDC via x402.

Parametersyearrequiredcalendar

payment_due_date

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.

ParametersdaterequiredadjustpayDayrequiredclosingrequiredcalendarmonthOffset

bank_value_date

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.

ParameterscutoffdatetimeextraDays

jpx_trading_day

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.

Parametersdaterequired

jpx_record_date

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.

ParametersrecordDaterequired

jpx_sq_date

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.

Parametersmonthrequired

japanese_koyomi

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.

Parametersdaterequired

find_lucky_days_japan

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.

Parameterstorequiredfromrequiredrokuyoweekdays

Version history

1
  1. v1.0.0LatestSep 26, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.