How do I get an e-Stat API key?

Register for a free account at e-stat.go.jp, then visit your My Page to generate an Application ID (appId). Approval is instant.

Is the data available in English?

Many tables support English translations for table titles and category names. The API uses lang=E by default. Some specialized datasets may only be available in Japanese.

What types of statistics are covered?

The database covers national census data, labor force surveys, consumer price indices (CPI), trade statistics, industrial production, health, and education metrics published by all Japanese government ministries.

Japan e-Stat MCP Server for LangChain 2 tools — connect in under 2 minutes

Name: Japan e-Stat
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 2 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Japan e-Stat through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "japan-e-stat": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Japan e-Stat, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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About Japan e-Stat MCP Server

The Japan e-Stat MCP Server connects your AI agent to the official Portal of Government Statistics of Japan — the most comprehensive public data repository for the world's third-largest economy.

LangChain's ecosystem of 500+ components combines seamlessly with Japan e-Stat through native MCP adapters. Connect 2 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

Core Capabilities

Table Search — Discover statistical tables across all Japanese government ministries by keyword. Covers census data, national accounts, industrial production, foreign trade, labor force surveys, and more.
Data Retrieval — Pull raw numerical data from any table, fully classified by category, geographic area, and time period.
English Support — The API supports lang=E for English-translated table names and categories where available.

Free API key required (instant registration at e-stat.go.jp). Japan publishes some of the most detailed and reliable economic statistics in the world, making this an essential resource for global macro analysis, trade research, and market intelligence.

The Japan e-Stat MCP Server exposes 2 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Japan e-Stat to LangChain via MCP

Follow these steps to integrate the Japan e-Stat MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 2 tools from Japan e-Stat via MCP

Why Use LangChain with the Japan e-Stat MCP Server

LangChain provides unique advantages when paired with Japan e-Stat through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Japan e-Stat MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Japan e-Stat queries for multi-turn workflows

Japan e-Stat + LangChain Use Cases

Practical scenarios where LangChain combined with the Japan e-Stat MCP Server delivers measurable value.

RAG with live data: combine Japan e-Stat tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Japan e-Stat, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Japan e-Stat tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Japan e-Stat tool call, measure latency, and optimize your agent's performance

Japan e-Stat MCP Tools for LangChain (2)

These 2 tools become available when you connect Japan e-Stat to LangChain via MCP:

get_japan_stats_data

Use search_japan_statistics first to find the correct table ID. Returns category-classified data with time periods, areas, and values. Retrieve statistical data from a specific Japanese Government e-Stat table

search_japan_statistics

Returns table IDs, organization names, titles, and survey dates. Use the returned table ID with get_japan_stats_data to retrieve actual numbers. Keywords work in both English and Japanese. Common topics: population, GDP, industry, trade, employment, tourism, education, health. Search for statistical tables in the Japanese Government e-Stat database

Example Prompts for Japan e-Stat in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Japan e-Stat immediately.

"Find Japanese population statistics by prefecture."

"Fetch the latest Consumer Price Index (CPI) data for Tokyo."

"Show me the industrial production index for the automotive sector."

Troubleshooting Japan e-Stat MCP Server with LangChain

Common issues when connecting Japan e-Stat to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Japan e-Stat + LangChain FAQ

Common questions about integrating Japan e-Stat MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.