What's unique about Japanese solo automation
Japan combines (1) LINE official account support, (2) business-card (Sansan) driven leads, (3) freee/Yayoi accounting, (4) Invoice System compliance. Global automation alone struggles to stitch these four together.
Principles
1. LINE-centric customer journey 2. Business card → CRM → tax flow automation 3. Invoice System and My Number compliance
Essential categories
1. LINE-based support **Channel.io (Japan)** or **LINE official account + KARAKURI chatbot**
2. Business card digitization **Sansan** — the primary lead source for Japanese B2B.
3. Accounting / invoicing **freee** or **Money Forward Cloud** — Invoice System, bank integration, withholding tax.
4. Workflow automation **Yoom** (Japan SaaS specialist), **Anyflow**, **n8n** — local automation with easy freee/Sansan/Chatwork connectors.
5. AI assistants **ChatGPT / Claude** + **ELYZA** (Japanese model) — replies, summaries, translation.
6. Meetings / voice **Notta / AutoMemo / Rimo Voice** — Japanese meeting recording and summarization.
Recommended solo stack
- LINE official account + Channel.io
- Sansan (leads)
- freee (accounting + HR)
- Yoom (automation)
- Claude Pro + ELYZA
- Notta (meetings)
Fixed cost ~¥50,000/month — about half the cost of one administrative hire.
Japanese field tips
- For customers needing 稟議 approval, let freee handle the PDF quote + qualified invoice
- LINE reply tone defaults to polite 敬語. Have a human review AI-generated text once
- Sansan API auto-syncs business cards to CRM and cuts manual data entry more than half
Pitfalls
- Delaying Invoice System compliance: post-October 2023, Japanese B2B customers require qualified invoices
- No LINE official account, only a web form: Japanese customer response rate drops noticeably
- English-only automation: missing kintone/freee connectors leaves you half-automated
For a Japanese solo founder, the spine is LINE + Sansan + freee + Japanese AI; stitch with Yoom or n8n and most repetitive work evaporates.