About: はる子 (Haruko)
A non-engineer working in Tokyo. 20+ years of FX trading. Currently running Claude Code with 4 AI assistants daily, on three lanes:
Three Lanes
1. Semiconductor Translation (@haruko_ai_jp)
Daily Japanese translation of Chinese AI × Korean/Taiwanese semiconductor × robotics primary sources. Breaking-news lane.
2. Forgotten Document Mining (this blog)
Mining expired patents, deprecated standards, old papers, declassified military reports, bankruptcy filings — and now documents tied to everyday household life (food-additive approval records, cosmetic-ingredient discovery papers, OTC drug transitions, the first editions of maternal-child handbooks) — with Claude. Re-translating them into modern context.
From May 2026, the notebook entered Phase 1 (daily-life focus): five sub-series that descend into the kitchen, medicine cabinet, fridge, and dressing table.
Sub-Series (from May 2026)
Phase 1: Five daily-life sub-series
- Kitchen Health Archaeology — food additives, seasonings, kitchenware, food hygiene
- Cosmetic Archaeology — cosmetic ingredients, founding documents of legacy brands, regulatory history
- Pharma Archaeology — OTC approval records, prescription-to-OTC transitions, the medicine cabinet's history
- Maternal Archaeology — maternal-and-child handbooks, school lunch standards, parenting books
- Diet Trend Archaeology — source papers behind fad diets, revisions to nutritional guidelines
Established industry-side sub-series
- Patent Archaeology — expired patents
- IR Archaeology — old Korean / Chinese / Taiwanese IR archives
- Standard Archaeology — deprecated standards, zero-citation arXiv papers
- Declassified Archaeology — US military declassified, government reports nobody reads
3. Web App Demos
Eight production web apps as proof-of-concept of "human-to-LLM compression": day1, kanban-AI, MediBridge, VetBridge, uchinoko-kimochi, 1000yen-lunch, kotsukotsu-fx, AI Archaeology (this site). See all 8 apps.
E-book Edition (Japanese only)
The first 9 episodes of this series have been re-edited into a PDF book in Japanese.
"Forgotten Long-Document Excavation Notes — Haruko's AI Archaeology with LLM (1st Edition, 7 Chapters)"
- Format: PDF (~40,000 Japanese characters, ~200 pages, A5-equivalent)
- Price: ¥980
- Available on: Booth (Japan)
All episodes remain freely available in full text on this website. The e-book is for readers who want offline access or PDF archival.
Editorial Principles
- Four-axis structure — every episode follows: Past Document → How It Changed → Modern Hint → Practical Application. Summary alone is not enough
- Primary sources only — no name-dropping unverified publications
- No position-talking — never push readers toward what benefits me
- Failure modes recorded — fabrications, misreadings, cost explosions
- Prompt disclosure ended (from May 2026) — all initial prompts are consolidated in Episode 7 Templates and the Japanese e-book first edition. New episodes omit per-post prompt sections to better fit the daily-life reader audience
- Modern judgments are reader-owned — this notebook is an archival exercise. For modern judgments on health, nutrition, and cosmetics, please consult up-to-date sources and qualified professionals