Watching lunar eclipse. Too bad my mobile’s camera can’t capture it!

So it’s been announced. I’ll be one of the keynote speakers at Fukuoka Rubyist Kaigi 05! Hope to see you there 😃

福岡Rubyist会議05 | Fukuoka RubyistKaigi 05 2026.02.28(Sat) 10:00 - 18:00 開催予定！ 福岡Rubyist会議05公式サイトです。

福岡 Rubyist会議 05 の公式サイトをオープンしました！
あわせてキーノートスピーカーも公開しました。今回のキーノートスピーカーは @yujiyokoo.bsky.social と @yancya.club のご両名です！
#fukuokark05

regional.rubykaigi.org/fukuoka05/

Is AES-128 still safe in a quantum world?
Sort of — but not enough.

Quantum computers could run Grover’s algorithm and halve its effective strength. That turns AES-128 into something like "AES-64" — and that's breakable

#Cryptography #PostQuantum #QuantumComputing #InfoSec

Watching UFC 313 at a pub in Shibuya

GitHub - yujiyokoo/blockpuzzle-mruby-psx: Block puzzle in mruby, for Sony Playstation Block puzzle in mruby, for Sony Playstation. Contribute to yujiyokoo/blockpuzzle-mruby-psx development by creating an account on GitHub.

Oops, forgot to add link to code: github.com/yujiyokoo/bl...

Screen showing block puzzle game in mruby, on Sony PlayStation

Pretty crude and slow, with poorly written code at approx 2 frames per second, but somewhat functional mruby block puzzle on Sony PlayStation

vimeo.com/1063783533

Booting my own program on PS1 is such a pain in the arse

Today I went to Setagaya Literary Museum to see Aki Irie and Kaoru Mori’s work. Beautiful art produced by so much work

Ruby code for returning a simple string

C code for running and outputting the result from mruby

Emulator output of the returned string

Simple Ruby code, mruby loader with PSn00bSDK, and emulator output. At least it compiles and runs on the emulator now... hopefully it's a start of something new and interesting #playstation #psx #ps1 #mruby

Reading up on SQL with this book I bought at #TokyoRubyKaigi

I did yet another block puzzle implementation over the new year and the recent long weekend 😃
This time, it's Ruby and curses on the terminal:
github.com/yujiyokoo/tu...

Today I went to The National Museum of Emerging Science and Innovation (Miraikan) to see “A Hands-On Model of the Internet” which ends on Monday the 13th. Also checked out “Notre Dame De Paris” exhibition. And, Unicorn Gundam statue while I was in the area

I made it just in time!#RustTokyoAfterNight

Ghost in the Shell SAC 2045 whisky at Liquor Museum Nishi/Shinjuku

I supported this with a small donation 🙂 congrant.com/project/kids...

I was at #RustTokyo2024 most of the day today. It was a really fun event and I learnt a lot!

Hello, world! 👋