A 24-hour mountain lounge, run by us. Tsumagoi Work&Camp is a 24-hour lounge at 1,444 m in Tsumagoi, Gunma, on a former ranch where the nearest homes are about 10 km away by road. Guests sleep in their own car or pitch a tent anywhere on the field, work from the Kotatsu Lounge on fiber internet, and end the day by the fire. We renovated the buildings ourselves, built most of the furniture on site, and opened in August 2026. The website, online booking, payments and on-site sensors are all software we wrote.
Tells you why your AI-built app broke, and hands the fix to your editor. Error trackers record what the code throws, so a bug that throws nothing, like a button hidden behind a header, slips past them. Mushi Mushi adds a small report-a-bug button to any website or app, and can also look for bugs before anyone reports them. AI rates each report, groups duplicates, explains the likely cause in plain words and drafts a fix you can hand to Cursor, Claude Code or Lovable. A second AI reviews each fix, and nothing merges unless you merge it or turn on automatic merging, which is off by default. It is open source, with a free hosted plan. (GitHub)
Lazycow Studio turns the photos and videos you never edited into short vertical reels for Reels, Shorts and TikTok, and into long YouTube videos in parts, with maps and chapters. It finds the right clips, cuts them on the beat of free music, books one post a day on each network and later shows how each post did. It runs on your own computer: tagging and search happen there, and your footage is only read, never changed or uploaded to be tagged. A person approves every reel, and nothing is booked or posted before that. We built it first to post the reels of our own campground, Tsumagoi Work&Camp. It is free and open source (Apache-2.0). (GitHub)
Solo Boss keeps the books for one-person companies in Japan and takes them through to the tax filing. Bank lines and receipts become journal entries with AI help, the AI shows why it suggested each entry, and a check of more than 30 points catches mistakes before you file. Already use other accounting software? Import its journal instead. A read-only sample company lets you look around without signing up, and it is free for now.
Step-by-step playbooks that keep AI coding assistants on track. AI coding assistants such as Claude Code, Cursor, Codex and Gemini often stop halfway, or say a job is done when it is not. kenji skills is a free, open-source set of written procedures they follow step by step, from fixing a bug to shipping a release, and a separate AI checks that the work is really finished. We use it on every project we run, and it installs with one command. (GitHub)
The business plan behind Tsumagoi Work&Camp. Before the camp opened, we published its business plan as an interactive website: what the old ranch building would become, what it would cost, and which permits each service needs. The six-page plan we prepared for the bank and insurers is part of it.
A daily work log for a team’s projects. Project Ledger is a work diary for teams: each person records what they did and for how many hours, project by project. The public example runs on made-up demo data: a fictional clinic booking app, its team and every entry.
A guest kiosk and RSVP page made for one wedding. Made for our founder’s own wedding dinner: a tablet at the entrance where guests could check the schedule, read how the couple met and look through their photos. A separate page collected RSVPs for the beach ceremony. The live site is password-protected, for invited guests only.
Take one selfie in natural light and get scores for more than 20 skin concerns, such as pores, hydration and texture, plus 4 to 6 care tips. Claude reads the photo. It is free and needs no account. The photo is never stored, and nothing is saved unless you make a share link.
Projects, estimates, invoices and delivery in one place. ProjectFlow is a management dashboard for teams that deliver work to clients. It follows each job from estimate to delivery and invoice, so nobody has to piece the picture together from spreadsheets and chat threads. It works in English and Japanese.
A Thai learning app with an AI tutor. glot.it teaches Thai to people starting from zero, whether for a trip, a Thai partner or family, or work. It covers the Thai script, the five tones and everyday speaking, with an AI tutor you can talk to. It runs in the browser and on iPhone and Android. (App Store · Google Play)
help her take photo links two phones. One is the camera, and the other shows that camera’s view live, so the person being photographed can see the shot and direct it before it is taken. It is made for couples and friends who travel together, on iPhone and Android. (App Store · Google Play)
yen-yen is a household money book that two people, or a whole family, keep together. It never asks for your bank login: add spending by hand in a few seconds, snap a receipt, or paste a bank statement, and AI reads it for you to check before anything is saved. Each expense goes into one of four kakeibo groups, so by the weekend you can see where the money went. On iPhone and Android. (App Store · Google Play)
Plan and make an 8-second AI video, step by step. Konte (Japanese for storyboard) walks you through a short AI video the way a film crew works: pick a template, write the scene, choose the camera and mood, review, then render. Google’s Veo makes the video with your own Gemini API key, so Google bills you directly and Konte charges nothing. It is a prototype, first built for babuu AI.
A book about why we want, free to read online. Why do people want, and why do some take while others give? the wanting mind is a 36-chapter book by our founder that follows that question through neuroscience, economics, philosophy and anthropology. It is free to read on the web and in the iPhone and Android apps. (App Store · Google Play)
Practise difficult conversations with an AI coach. lets-talk helps you work out what to say when a message is hard to answer, from an upset boss, partner or friend. Paste their message to see their side and get replies you could send, write your own reply and get it scored, or rehearse the whole chat with an AI that plays the other person. On iPhone, Android and the web. Start free with no account; after the included practice, sign in for credits or use your own Anthropic key. It is a practice tool, not therapy. (App Store · Google Play)
Live transcription in your browser, no account. Hear, Hear turns speech into text while people talk, using the browser’s own speech recognition (in Chrome, that means Google’s). Every line keeps its timestamp, and tapping a line replays that moment. There is no account, and the recordings and transcripts are saved only in your browser. In this public version a recording can run up to five minutes.