ネスゴシ
Free · play online in your browser, no download
You overslept on the train and woke at an unknown station. Open the route map one line at a time and name where you are. The developer says Claude Code did the implementation.
Official site nesugoshi.app, verified Nov 3, 2026. Linked as the game in the developer's own Hatena Blog release post and Zenn article.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About ネスゴシ
ネスゴシ (Nesugoshi, from the Japanese for oversleeping past your stop) is a free daily railway puzzle for the browser. One station is drawn from the railway stations of Japan, and at first you see only that station and the lines leading out of it: no station or line names, just initials and positions. Each turn you open a neighbouring station, and the map keeps opening along that line until it reaches a transfer station or a terminus, so the shape of the network slowly appears. When you think you know where you are, you name any station on screen; a wrong guess only adds a penalty, and the aim is to clear it in as few turns as possible, naming a station as close as possible to where you woke up. There is a daily puzzle shared by all players with a streak counter, a free-ride mode with Easy, Normal, Hard and Custom difficulty, spoiler-free sharing of results, and a sightseeing mode that simply follows lines from any station with names shown. The station and line data come from 駅データ.jp. The developer, Pocke, says it was vibe coded with Claude Code in a little over a week: Claude Code turned the design into issues and implemented them, and the developer reviewed pull-request descriptions and the app's behaviour without reading the code. Free in the browser, in Japanese; the page loads Google ads.
How it was built
VerifiedIn a Zenn article (9 Sep 2026) the developer says the release a little over a week after the idea was possible by vibe coding with Claude Code. The developer took the idea to Claude chat, which checked its feasibility and looked for existing games of the kind; the chat also settled the name and wrote the design document; Claude Code split the design into about 30 GitHub issues, listed the tasks the developer had to do (such as downloading the railway data) and built a playable proof of concept in about 30 minutes. For the main build the developer wrote short issues, had Fable work out detailed specifications (which the developer reviewed closely), had Sonnet implement them (after starting with Opus and running short of tokens) and Opus self-review, then reviewed and merged the pull requests: “レビューはPRのdescriptionとアプリの挙動だけで、コードの中身は基本的に見ていません” (the review covered only the PR description and the app's behaviour; the developer basically did not look at the code).
Spec in Claude chat, issues and implementation by Claude Code (Fable for specifications, Sonnet for implementation, Opus for self-review), with the developer reviewing pull-request descriptions and behaviour on Cloudflare Workers preview builds. A static web app on Cloudflare Workers, with Workers KV caching each day's puzzle so it cannot change during the day after a deploy. Station, line and transfer data come from 駅データ.jp, with the developer's own rules on which lines count (cable cars and the Narita Express are excluded) and on transfers and tram routes.
- Engine / framework
- None (static web app on Cloudflare Workers)
- Languages
- Not disclosed
- Team size
- Not disclosed
- Initial build time
- A little over one week from idea to releaseDeveloper ReportedZenn (pocke)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Claude Codeを活用してVibe Codingで進めることで、このスケジュールでのリリースが可能となりました。”- 鉄道ブラウザゲームを1週間強でリリースするまで (developer's Zenn article, Japanese)
- Release post on the developer's blog (Japanese)
Verification notes: AI use, the workflow, the timeline, the hosting and the data rules come from the developer's Zenn article (9 Sep 2026), read through Zenn's API on 6 Nov 2026; rules, modes, difficulty levels and sharing come from the developer's Hatena Blog release post (4 Sep 2026, 10:04 JST), read the same day. Both link nesugoshi.app, which loaded on 6 Nov 2026; its page loads Google AdSense and its script contacts no AI services. Fable, Sonnet and Opus are the model names the developer gives. The licence terms of the 駅データ.jp data were not checked. Team size and location are not stated; the article says a password-protected preview, deployed the day after the proof of concept, brought in bug reports.
Development history
Released in the browser, announced on the developer's blog, with a daily puzzle and a free-ride mode.
DeveloperHatena Blog (Pocke)The developer describes the Claude Code workflow and the railway-data decisions on Zenn.
DeveloperZenn (pocke)
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.
Browser (official site)
Free in the browser; the page loads Google AdSense.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| 鉄道ブラウザゲームを1週間強でリリースするまで Zenn (pocke) · Japanese | Devlog | Sep 9, 2026 | Nov 3, 2026 |
| 路線図から駅を当てるブラウザゲーム「ネスゴシ」を作りました Hatena Blog (Pocke) · Japanese | Devlog | Sep 4, 2026 | Nov 3, 2026 |
| Official game page (language check) Pocke | Official site | Not confirmed | Nov 3, 2026 |
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