ことづての庭
Rake sand and set stones in a Japanese garden whose seasons follow the real calendar; its developer says no human wrote any of its code.
Links go to the official store or developer page. Last verified Nov 3, 2026.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- View on the App StoreApp StoreReleasedFree-to-Play
Install from Apple's App Store on an iPhone or iPad.
Mobile · Official link verified Nov 3, 2026.
- View on SteamSteamReleased$3.99
Download through the Steam app. A free Steam account is required.
Desktop · Official link verified Nov 3, 2026.
About ことづての庭
A slow, quiet game about building your own Japanese garden. You draw lines in sand that flows and settles around the stones and objects you place, dig or build up the ground to steer it, and then walk through the garden in first person. The garden's seasons and time of day follow your device's real calendar and clock, from cherry blossoms in April to falling maple leaves in late November, and the garden keeps changing while the app is closed. Occasional letters from a master suggest tasks, which you can ignore. Online features let you publish your garden, save it to the cloud and visit other players' gardens to leave one object and a pre-written message, without names. The developer, notfolder, wrote a detailed Qiita post about making it alone in 35 days with AI: Claude Code wrote all of the Unity C# code (about 71,000 lines) and a TypeScript server, the plan and specifications were worked out in conversations on claude.ai, and the art, 3D models, music and sound effects came from other generative AI services. The developer says no person wrote a line of code or made any of the assets. Free on iPhone and iPad with one in-app purchase that unlocks the online features; paid on the Mac App Store and on Steam for Windows and macOS. Japanese only.
Screenshots and art
ことづての庭 key art · Steam store artwork
How it was built
VerifiedThe developer's Qiita article says Claude Code did the implementation: 310 C# files with 71,216 lines in Unity, a 2,137-line TypeScript server, 302 core tests and the tools that rebuild the Unity scene from code and capture screenshots automatically, so the developer never edited the scene by hand. Claude Code also drove Unity and Blender from the command line and wrote the asset pipeline that calls the image, 3D, music and sound services. The developer says no human wrote any code, gave instructions and accepted or rejected the results, and judged the work by whether it ran, whether the tests passed and whether the screen looked right, without reading the code. The developer adds that the tests and the screenshot tools appeared before they had asked for them.
- DeveloperSteam AI disclosure: program by Claude Code (Anthropic); character illustrations, UI art and backgrounds by ChatGPT; 3D models by Tripo AI; music by Tunee AI; sound effects by ElevenLabs; part of the scenario by Claude. The developer chose what to use, and the AI generates nothing new during play. — Steam
Planning happened in claude.ai, per the Qiita article: on the first day the developer asked Claude for 16 game ideas, picked the sand-garden one, and answered Claude's questions one at a time (89 exchanges that day) until there were six specification documents of 1,120 lines, which then went to Claude Code. The Steam disclosure also credits Claude with part of the scenario.
- DeveloperSteam AI disclosure: part of the scenario was written with Claude (Anthropic). — Steam
One person, working with AI at every step, per the Qiita article: planning in claude.ai, implementation in Claude Code, assets through an AI-written pipeline (Tripo for 3D models, gpt-image for textures, UI and portraits, ElevenLabs for sound effects, Tunee for music) and the App Store submission done by asking AI step by step. The Unity scene is generated from code and never edited by hand, and checks run from the command line: core tests, scene rebuilds as a compile gate, automatic play-and-screenshot runs, a minimum text-size check and a ledger of where every asset came from. The developer kept AI asset costs under a cap (109 generations for US$38.98 in the logged period) and says the music still needed manual steps because the service has no API. Work started on 18 Jul 2026 and the iOS build went to Apple on 22 Aug; the developer estimates 60–76 hours of their own time from timestamped chat logs.
- Engine / framework
- Unity
- Languages
- C#, TypeScript
- Team size
- 1 (solo)Developer ReportedQiita (notfolder)
- Initial build time
- 35 days from the first prompt to App Store submission, with an estimated 60–76 hours of the developer's own timeDeveloper ReportedQiita (notfolder)
- Development time
- 5 weeksDeveloper ReportedQiita (notfolder)
- Development cost
- Not disclosed
- AI-written code
- ~100% of shipped codeDeveloper ReportedQiita (notfolder)
Verification notes: AI use from two developer sources that agree: the developer's Qiita article (posted 5 Sep 2026 as a re-post after the original was deleted; updated 26 Sep), with figures taken from its git history and chat logs, and the AI disclosure on the Steam page, which names Claude Code for the program. The 100% AI code share is the developer's statement that humans wrote zero lines of code. The asset services (ChatGPT / gpt-image, Tripo, Tunee, ElevenLabs) are not tools we track and are recorded in the text only. The official site links the App Store, Mac App Store, Google Play and Steam pages and the Qiita article; Steam lists notfolder as developer and publisher with the official site as its website. Release dates: iOS 2 Sep and Mac 6 Sep 2026 (Apple's lookup data), Steam 13 Oct 2026 (Steam store API); the Android version on Google Play, released on 22 Sep per the developer, is not listed because Google Play is not a platform we track. The iOS app showed one 5-star rating and the Steam page showed no user reviews on 3 Nov 2026, so no rating or review metrics are recorded. Team size and dates from the article; the developer's location is not stated.
Development history
Development starts: the developer asks Claude about making a game one person could build, chooses the sand-garden idea and settles the specification the same day.
DeveloperQiita (notfolder)The iOS version is submitted to Apple for review, 35 days after the start.
DeveloperQiita (notfolder)Released on the App Store for iPhone and iPad, free with an in-app purchase for the online features.
OfficialApple App Storeことづての庭 PC版 released on the Mac App Store for ¥500.
OfficialApple App StoreAndroid version released on Google Play, per the developer.
DeveloperQiita (notfolder)Released on Steam for Windows and macOS.
OfficialSteam
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
App Store (iOS)
Free on the Japanese App Store for iPhone and iPad, with one in-app purchase that unlocks the online features (observed 3 Nov 2026). A separate Mac App Store version, ことづての庭 PC版, costs ¥500.
Not publicly available: Gross revenue.
Steam
US$3.99 on the Steam store API on 3 Nov 2026. Windows and macOS.
Not publicly available: Concurrent players, Steam reviews, Positive Steam reviews, Estimated owners, Copies sold, Gross revenue.
Reviews & rankings
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Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| 【再投稿】AIで一人でゲームを作れるか試したら、35日・実質8人日でApp Store審査、公開まで行った話 Qiita (notfolder) · Japanese | Devlog | Sep 5, 2026 | Nov 3, 2026 |
| ことづての庭 — official site notfolder · Japanese | Official site | Not confirmed | Nov 3, 2026 |
| ことづての庭 on the App Store (Japan) Apple App Store · Japanese | Store page | Not confirmed | Nov 3, 2026 |
| ことづての庭 PC版 on the Mac App Store (Japan) Apple App Store · Japanese | Store page | Not confirmed | Nov 3, 2026 |
| ことづての庭 on Steam Steam · Japanese | Store page | Not confirmed | Nov 3, 2026 |
- Languages
- Steam lists Japanese only and the official site's English page says the game is in Japanese only, but Apple's store data lists English as the app's only language. (Steam, notfolder, Apple App Store)
