Notes
Tech, books, and what I learn day to day. The notes I write here.
2026

I built deckroom, an online board game site you can play over a call, even with just two people
I built deckroom, an online board game site where everyone joins from one URL while on a call. Here are its 14 games, from two-player matches to games for remote icebreakers and online parties.

[ML Engineer Stories: Lab Edition] How my lab, hackathon, and internships paid off after I joined a company
For students aiming to become ML engineers: where the things I built up in the lab, at a hackathon, and in internships paid off after joining a company, and what's worth doing while you're still a student.

[ML Engineer Stories: Getting There] What helped me become an ML engineer
A student who did ML in a university lab writes about how getting hands-on with things outside ML paid off after joining a company.

We chose our wedding venue at the first one we saw [Venue Hunting]
What happened at our first wedding venue tour. A record of four hours on our feet starting before 8 a.m., ending with booking the very first venue on the spot.

Two of us spent six hours escaping the Ghost Apartment at Night
A boxed escape game from SCRAP, played as a married couple. The expected time is 90 to 150 minutes; we finished in six hours.

The Hitman's Sales Technique is not a hitman story but a sales textbook
Winner of the 71st Edogawa Rampo Prize. I started reading it as a guide to sales, and what stayed with me in the end was the feel of death.

For our Obon trip home to Tokushima, we skipped the plane and took a car share from Shin-Kobe
How a Tokyo–Tokushima trip home that would have cost 150,000 yen by plane and rental car came to 104,000 yen by bullet train and car share.
2025

After reading a book on dialogue facilitation, I decided to stop asking "why?"
A book about dropping "why?" and "what do you think?" and asking only about facts. It looks like it works as-is at work and at home.

In the age of AI, I started writing a diary in my own words
After handing my writing to AI for so long, I feel my vocabulary slipping. Here are three reasons I started a diary because of that.