Manual workdone automatically.

COREC orders → freee invoices: 8 hours down to just 10 minutes. Pick a template, AI does the rest.

Excelの再発明、Saturn - YouTube

How is Saturn different from general AI?

ChatGPT and Claude are versatile. But bulk business data processing, storage, and integration? Not designed for it.

ChatGPT Gemini Perplexity Manus Claude Saturn With Saturn
Bulk processing × × × △ △ ◎ Drop 100 companies → all columns auto-fill
Built-in company DB × × △ × × ◎ 6M+ companies from EDINET, gBizINFO, and other public DBs
Data accuracy × × △ △ × ◎ Public data + actual site crawl. No hallucinations
Results persist in tables × △ × △ △ ◎ Stored in Excel-like tables. Search, sort, filter
Decision-maker ID × × × △ × ◎ Auto-extract officers from annual reports → direct mail targets
Letters & proposals △ △ × △ △ ◎ Company-aware letters exported to Word in bulk
Business tool integration △ △ × × △ ◎ Auto-transfer to freee invoices, COREC orders (8h → 10min)

Works like Excel, but everything is connected behind the scenes

Pick a template, press a button. From data retrieval to transfer, columns auto-fill in sequence.

Arrange columns = build a workflow

"COREC orders" → "freee contact lookup" → "invoice transfer". Line up columns left to right, and AI processes them in order.

6M+ companies pre-loaded from day one

Annual reports (EDINET), subsidies & patents (gBizINFO), corporate websites. Enter a company name and data flows in automatically.

Same data for humans and AI

The data on your screen is callable from Claude and ChatGPT via MCP. Humans and AI work from the same source of truth.

This much changes

Pick a template. AI handles the rest.

Accounting

  • COREC orders → freee invoices | 100/day: 8 hours → 5 min
  • Gmail invoices → Zengin bank format | zero manual entry
  • Outlook invoices → Zengin bank format

Sales

  • Company research | EDINET + gBizINFO + Web in 30 sec
  • AI sales letters | personalized per company
  • Trade show follow-up | 500 cards → same-day emails

Recruiting

  • Gmail resume PDF → AI screening | 100 apps/day auto-scored
  • Outlook applications → AI scoring

Support

  • Gmail / Outlook → AI triage & reply | avg 3 min → instant
  • LINE → AI classification & reply
  • Gmail → Zoho CRM lead transfer

Marketing

  • SNS thumbnails | 50/month auto-generated with Gemini
  • note SEO articles | bulk generate from keywords → auto-publish

Documents & Notifications

  • Google Forms → acceptance PDF generation
  • Table → Slack / Teams auto-notification

All templates run on the same engine. Just pick the one you need.

DATA SOURCES

Just enter a company name. Data flows in.

Enter a company name. Financials, people, and news auto-populate column by column.

EDINET

Live

Annual reports (PDF + XBRL financials). 130K documents over 10 years.

gBizINFO

Live

Basic info, subsidies, patents, procurement, certifications. Corporate number-based.

Corporate Number

Live

Entity resolution foundation. Unification key for all government data.

Corporate Websites

Live

Structured crawl via Firecrawl. Business overview, IR, careers.

FOR DEVELOPERS

Access Japanese company data via API and MCP

Japanese company data, structured and normalized. Ready for your AI agents and internal tools.

REST API

Company search, financials, enrichment — programmatically.

MCP Server

22 tools + 6 resources. Direct access from Claude Desktop and AI agents via Streamable HTTP.

Webhooks

Real-time notifications on enrichment completion and new data.

// Fetch table data via MCP
const result = await mcp.callTool("list-rows", {
  workbookId: "wb_xxx",
  worksheetId: "ws_xxx",
  limit: 100,
});

// Enrich company data
await mcp.callTool("enrich-rows", {
  worksheetId: "ws_xxx",
  rowIds: ["row_1", "row_2"],
});

INTEGRATIONS

14 integrations

Email, accounting, orders, business cards, chat, CRM — one-click connect. Manual entry gone.

CUSTOMERS

Our Customers

Companies using Saturn to streamline their workflows.

PRICING

Zero risk to get started

14 days free. If it's not for you, just press cancel.

$0 setup fee 14 days completely free Cancel anytime, instantly

Starter

For small teams starting automation

¥30,000/mo

2,000 pt / mo

  • All templates available
  • External service integrations
  • Up to 10 tables

Pro

For teams needing serious processing power

¥98,000/mo

10,000 pt / mo

  • All templates available
  • External service integrations
  • Up to 50 tables
  • Priority support

FAQ

Frequently Asked Questions

What is Saturn?+

What data is available?+

How long does setup take?+

How accurate is the data?+

Is there a free trial?+

What is MCP?+

What about security?+

Can I cancel anytime?+

DEMO VIDEOS

See Saturn in action

Watch feature demos — each shipped as a release.

WHY SATURN

The meaning behind the name

The star that bears your trials

In astrology, Saturn is known as the planet of trials. Sales preparation—company research, letter writing, data entry. Saturn takes on that burden so you don’t have to.

FOUNDER

Why I built Saturn

One person spent 8 hours a day, 20 days a month, just copying COREC orders into freee invoices. That’s when I knew this was the problem I had to solve.

Takuya Tominaga

Solo Founder — Leach, Inc.

After 9 years at Toshiba, I left to talk to businesses firsthand. What I found was manual work everywhere. One company had someone spending 8 hours a day transferring order data to invoices.