Saturn - AI-powered back-office automation for Japanese SaaS

Saturn is an AI-powered back-office automation platform for Japanese SMBs. It reads invoices, purchase orders, and quotes from PDFs and Excel files, then automates data entry, document generation, and CSV exports across Japanese SaaS tools like COREC and freee. Think "Zapier for Japanese SaaS" — but spreadsheet-native and AI-first. No more manual copy-paste between systems.