A world where humans and robots share everyday life. Near-future short stories sparked by today's news.
Read on Kindle →A4 learning drills you personalize by talking with AI — for you and your kids. Expanding all the time.
Language-free math drills for the whole world. Timed challenges on YouTube, PDFs on Gumroad.
Free math drill pack on Gumroad →An English composition channel focused on building faster responses in conversation.
Free A1 sample pack on Gumroad → Next step: a short book in easy English →
Turns your bookshelf into a little online bookstore. Also surprisingly useful for AI-assisted book picking (I use it myself). Try it for your to-read pile, or just for sharing.
Available: Japan
Open Your Bookstore →
A 30-volume science fiction saga exploring four distinct cities in a world where humans and AI coexist. Experience the story through merchandise before the novels arrive.
I'm Jun Sasaki, a writer and creator based in Tokyo.
I believe in a future where technology amplifies human creativity rather than replacing it. My work explores the relationship between humans and AI through stories, products, and tools.
By day, I build businesses. By night, I write stories about the world I want to see in 2112.
A casual log of business and daily life. The free part shares real numbers; the paid part covers the thinking behind them. Share on X to read everything free, or ¥500 for unlimited reading.
Read Log →For other languages, please use Google Translate.
