Our stores
This site is home; the marketplaces below are our branch stores. Status labels mean exactly what they say — a store in review is never shown as “on sale”.
Payhip — Eichan
On saleOur own checkout shelf: AI prompts, agent skills and Notion templates, sold as instant downloads in USD.
PromptBase — @eichan
On saleAgent Skills for ChatGPT and Claude, sold on the PromptBase marketplace. New skills are added as they clear review.
Notion Marketplace — @eichan
In reviewThree business templates (agency delivery OS, invoice guard, product sales OS) submitted to the Notion Marketplace and in review. Until the Marketplace listing goes public, the same templates are available on Payhip (above).
note — えいちゃん (Japanese)
On saleJapanese articles about working with generative AI day to day, including the original AI Handover Kit article. This is our Japanese-language home.
Tips — えいちゃん (Japanese)
On saleThe AI Handover Kit in Tips sales format (Japanese, paid article).
Etsy — EichanJapan
In progressA Japan-themed digital shop (SVG icons, planners, spreadsheets) is being prepared. The shop opens once payment onboarding is complete.
Amazon Kindle (KDP)
In reviewThe AI Handover Kit, English ebook edition, is in review at Kindle Direct Publishing.
Google Play Books
In reviewThe AI Handover Kit ebook is in re-review at Google Play Books.
Apple Books
In progressThe AI Handover Kit ebook is being prepared for Apple Books; publishing setup is in progress.
Poe — NihongoSmallTalk
Coming soonA small-talk practice bot for Japanese learners. Launching soon.
Eloquens
In preparationFinancial models for AI agencies and operators (Excel). Five models are finished and being prepared for listing.
Codester — QuoteWidget
In preparationQuoteWidget, an instant estimate calculator widget for contractor websites. Listing resumes when the marketplace reopens uploads.
Whop — Eichan Japan
On saleJapan market-entry support services for overseas businesses, plus a small shelf of practical AI tools, sold on Whop.
AIMarket24
In preparationA new AI-agent marketplace. We are checking its terms and payout conditions before opening a seller account.
Unity Asset Store
In preparationA cozy farm 2D art kit for game developers is in preparation.
RemodelPro (Framer template)
In preparationA website template for remodelers with an instant estimate calculator. In planning.