In Japanese, after velocity, for each derivative of the position vector, you just add a "加" prefix. It gets pretty wild after jerk.

Successfully ran the Yakushima 55km Ultramarathon yesterday, next is Frieren 2nd season. Then I'll be going to Tokyo for the Geospatial Expo at the end of this month. This month is starting out to be really fun!

屋久島ウルトラマラソン55kmを完走して、次はフリーレン2期放送開始。そしてG空間EXPOで東京へ。謎の趣味の私。今月も楽しいぞ

My son picked up Conway’s game of life today. No idea where he got the idea from but he came to me with a running implementation using pygame.. experimenting with gliders, spaceships and guns. I never got in to it but he’s having a blast.

ベースマップに Mapterhorn を導入してみた。これでちょっと様子見だけど良さげな感じがします tiles.kmproj.com/basemaps#map...

🗺️ MapLibre December 2025 newsletter is out! Big thanks to all our contributors and sponsors for your consistent support. Wishing everyone a Mappy New Year 🎉 👉 Read the newsletter: maplibre.org/news/2026-01... #maplibre #openstreetmap #foss4g #opensource

息子が ollama で遊んでて、「クエン酸」の話してて、なんだろうと思ったけど「qwen3」のことだったんだねー

Happy New Year! Here's my annual short blog about last year and what I'm planning on doing this year. keita.blog/2025/2025-in...

I spent the past few days poking around the new MapLibre Tile spec and format. I originally wanted to make some code to generate them from scratch, but I realized that they are much more complicated than I had expected... Instead, I wrote about what I found. keita.blog/2025/maplibr... #maplibre

MapLibre Advent Calendar 2025 の5日目記事、公開しました！今回は、「MapLibre Tiles が使えるようになった！遊んでみよう！」という表題ですが、思ったより複雑で遊ぶところまでたどり着けなかった💦 内部構造などを調べたりしました。 qiita.com/sleepy__keit... #maplibre #mugjp #foss4g

I have published a podcast titled "# 001 Tech & Geospatial Chatter." 🎙️ This is the first episode of my series. 🎉 I plan to distribute this series regularly in the future. Please check it out! (This is a podcast in Japanese.) open.spotify.com/episode/0EsP...

So, I've been using Windows with WSL as my main work computer for about 1.5 - 2 years now. Before this, I've used Linux natively (Ubuntu) a few times, but before that - completely Mac only. I still use a M1 MacBook as my side machine.

Using the tool I released yesterday, I made some vector tiles using this data for cross-referencing . tiles.kmproj.com

Just released a tool to import administrative areas / subareas collected as part of the census in Japan to PostGIS: github.com/KotobaMedia/... The census agency only provides this data per prefecture, so it was bothersome to download all 47 prefectures and merge them.. now you can just use the tool!

Going to try being a bit more active over here. Here are some things I've been working on recently.

So how's everyone liking Apple Intelligence these days? The only thing I use Siri for is to add stuff to the shopping list (and because we live in Japan, it makes sense to do that in Japanese), so I can't use it yet.