The short version
- Free comedic parody web tool created by developer e6nlaq and hosted at `e6nlaq.github.io/zubari/`.
- Parodies smart 'I'll guess your hometown in 6 questions' binary-search quizzes by intentionally using the slowest O(N) linear scan possible.
- Instead of asking clever dialect or food questions, it bluntly asks each prefecture one by one until it hits yours—meaning Okinawa residents have to say 'No' 46 times in a row.
- Passed 233,146 views, 1,830 likes, and 417 bookmarks within hours of release.
At a glance
| Concept | Conversely the slowest hometown guessing service |
|---|---|
| Developer | e6nlaq / ru_milmil (e6nlaq.github.io/zubari/) |
| Algorithm | Worst-case linear brute-force scan across 47 prefectures |
| Reception | 233.1K+ views, 1,830 likes, 417 bookmarks |
| Platform & cost | Mobile & desktop browser — Free, no sign-up |
| Category | Web Games |
| Creator / publisher | e6nlaq |
| Official link | e6nlaq.github.io ↗ |
| Heat | 🔥 233.1K Heat |
| Announced | |
| Data updated |
From clever binary search to shameless O(N) brute force
Whenever hometown-guessing quizzes trend in Japan, developers usually compete to see how *few* questions they need to pinpoint a user's prefecture—using regional slang, soup broth colors, or binary search trees to narrow 47 prefectures down in five or six clicks.
Developer e6nlaq flipped that premise on its head on November 1, 2026 by launching 'A Service That Conversely Guesses Your Hometown in the Slowest Way Possible' on `e6nlaq.github.io/zubari/`. Rather than deducing anything from lifestyle hints, the page simply marches through the prefectures one by one and claims a 100% hit rate once you finally click 'Yes'.
Why programmers and southern-prefecture users loved the joke
The post announcing the tool quickly crossed 233,146 views, 1,830 likes, and 417 bookmarks because the punchline lands immediately for both software engineers and regular users. In computer science terms, replacing an O(log N) decision tree with an unoptimized O(N) sequential loop is the textbook worst-case algorithm.
For players born in southern prefectures like Kagoshima or Okinawa—or anyone who clicks 'No' all the way through—the sheer absurdity of clicking dozens of times just to be told 'We guessed your hometown!' makes it an instant comedy share.
Zero-bloat GitHub Pages experience
Hosted as a lightweight static web app on GitHub Pages (`e6nlaq.github.io/zubari/`), the tool opens instantaneously on smartphone or desktop browsers with no trackers, sign-up prompts, or ads getting in the way of the gag.
How to try it
Open e6nlaq.github.io/zubari/ in your browser
Click the launch button above to open the web page on mobile or desktop.
Keep clicking 'No' as it checks one prefecture at a time
Experience the intentionally glacial O(N) linear scan as the service asks through Japan's prefectures sequentially.
Click 'Yes' on your prefecture for the celebratory reveal
Confirm your actual prefecture to trigger the triumphant 'guessed it!' screen and share the joke.
FAQ
Where can I try the slowest hometown guessing service?
Click the launch button on this page to open `e6nlaq.github.io/zubari/` directly in your browser.
Does it actually use psychology or dialect analysis?
No—that is the joke. Instead of smart deduction, it intentionally takes the slowest possible route by checking prefectures one by one.
Is it free to use?
Yes, it is a free, open static page on GitHub Pages requiring no login or download.
