PlugRail Japanese Calendar is a Model Context Protocol (MCP) server: Japanese holiday and business-day calculations using official Japan Cabinet Office data. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.
It's a hosted (remote) server — point your client at https://jp-calendar.plugrail.dev/mcp and you're connected, with nothing to install locally. The current release is v0.1.1, published under the MIT license, with source at plugrail/servers on GitHub.
You'll find PlugRail Japanese Calendar in the Productivity category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain PlugRail Japanese Calendar for plugrail.dev, claim this listing to verify ownership, earn the Verified badge, and keep the details current.