Blog entries

Math, maps, code, language, and small internet experiments.

• 2026.02.16 Drill Through Earth: Antipode Finder Use geolocation or manual coordinates, then watch a D3 globe show the exact point where you would emerge on the opposite side of Earth. GeospatialD3.jsInteractive
• 2026.02.13 Top 100 Kanji: Misaki Gothic The most frequent kanji from Japanese Wikipedia, rendered side by side in standard text and an 8x8 pixel bitmap font. LanguageDataTypography
• 2025.07.07 High FPS GIF? A custom C GIF encoder used to test browser frame-rate limits, including side-by-side demos from 1 to 100 fps. SystemsFile FormatsBrowser Behavior
• 2025.06.06 Monotonous Music? An entropy-based study of lyric repetition across decades of Billboard tracks, with rankings by song, artist, and genre. Data ScienceInformation TheoryMusic
• 2025.05.20 Involute Gear! From curve equations to downloadable SVGs: a browser tool for generating practical involute gears with custom parameters. MathMechanical DesignWeb Tools
• 2025.04.29 3D Printing 目黒駅! A full GIS-to-print pipeline that turns Meguro Station map data into a physical 3D model. GISCAD3D Printing
• 2025.03.20 Lichess Analysis! 200M blitz games processed in C to produce heatmaps of checks, captures, and promotions across the chessboard. Big DataCVisualization
• 2025.03.08 LLM Comparison! A same-prompt code challenge where three LLMs generate a physics-based browser simulation side by side. LLMsJavaScriptExperiments
• 2024.08.20 Ultimate word in Wordle! An information-theory search for the strongest opening guess, showing why deeper trees beat naive entropy picks. AlgorithmsSearchWord Games
• 2024.08.12 Yamanote Pole of Inaccessiblity: ダンポロ Finding the point inside Tokyo's Yamanote loop that is farthest from any station, then visiting it in person. GeospatialPythonTokyo
• 2024.08.09 Counting all the Kanji in Japanese Wikipedia A full-corpus frequency count over nearly 2 billion characters, with rankings and distribution patterns for kanji usage. Text MiningJapaneseData Engineering
• 2024.08.06 PICO-8 study: Catch Pikachu! A tiny playable game built under strict fantasy-console limits: 128x128 resolution, 16 colors, and Lua scripting. Game DevPICO-8Lua
• 2024.08.05 Acquiring a JP Domain Name A practical guide to registering a .tokyo.jp domain and handling DNS/SSL details in Japan's registry workflow. InfrastructureDNSSSL
• 2024.08.04 Celestial Sphere! A rotating sky map with 10,000 Hipparcos stars and interactive constellations rendered directly in the browser. AstronomyVisualizationJavaScript