I develop programs for work (research on soil physics) and for fun. Here you can find some of my published programs. See also my Python packages, Rust crates, Go packages and mobile apps at App Store and Google Play.

• SWRC Fit - a web interface for fitting soil water retention curve used in many researches.
  
• unsatfit - Python library for optimizing parameters of functions of soil hydraulic properties. SWRC Fit uses unsatfit, and unsatfit also fits unsaturated hydraulic conductivity.
• hystfit - Python library for calculating hysteresis of soil water retention curve.
• UNSODA viewer - View UNSODA database.
• EC fit - fit soil water and electrical conductivity (EC) model to measured data.
• discfit - read disc permeameter data in the field and calculates hydraulic parameters of the soil.
• Recommendation - お薦めしていただきました。

Sudoku Kaidoku - Online puzzles with various difficulty. Also available:

• 
• PDF books
• Command-line (Downloads)
• Sudoku quiz

Dodgem (ドッジェム) - abstract strategy game

15 Puzzle (15パズル) - online player of a sliding puzzle. The size of the puzzle can be changed to 3, 8, 15, 24, 35, ...

• Statistics: 二項分布とポアソン分布 / ポアソン分布と正規分布
• compute-pi - compute 1 million digits of π in a few seconds (Rust)

• slidemovie - Markdown and PowerPoint to narration video generator
• md-llm-lang-reader - Generate language-learning HTML readers (with sentence-level LLM translations and TTS) from Markdown.
• paperfig - JSON-driven orchestration for building and concatenating paper figures.
• pdfgridcat - arrange multiple PDF pages into a grid without scaling or margins.
• findstring - search for a string in files recursively.
• multiai - Python library and command-line tool designed to interact with text-based generative AI models.
• passme - a password management tool with command line or web browzer.
• Link Checker for Go - Concurrently checks links in URLs or local HTML files, controlling request intervals to the same host to prevent overload.

• JavaScript の小物
• Python の小物
• Rust のプログラム
• Go の記事

• Academic CV and most cited papers
• Photos with Moomin family
  
• メモ帳
• ケトルベルトレーニング
  
• ゲームのページ 自作詰将棋等、1996年開設

• Twitter @seki
• Linkedin @sekik
• YouTube
• pebble @seki
• Facebook
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• 詰将棋メーカー
• Note that SNS accounts with the same name with me may not be my accout if not listed here

• If you like my software, I always welcome your feedback by mentioning me at twitter in English or Japanese.
• Please find my email address in this paper.