Play Japanese Sums Online Free
One of the shorter breaks on this site — logic, no install, nothing to sign up for.
About This Game
**Japanese Sums** sits in the logic corner of the games shelf. Everything here is browser-native, so the page you are on is the whole game: no installer, no launcher, no account wall between you and the first move. We keep these titles short on purpose — a break that swallows an hour is not a break, and the guides on this site are long enough that you will want your attention back.
Play Japanese Sums puzzle online free! A GMPuzzles-style number placement logic puzzle. Place digits 1-N in cells so outside clues match the sums of contiguous number groups. No repeats per row or column. 30 unique-solution levels across 5 difficulty tiers from 4x4 Beginner to 7x7 Expert. Hints, star ratings, level select, keyboard support, ambient Web Audio music. No download, mobile-friendly!
No account, no cloud save and no leaderboard means nothing about your session is stored anywhere. That is deliberate. A break should not leave a footprint, and this one does not.
How to Play
- Start the game in the frame above; it runs directly in this page on desktop, tablet and phone.
- Sound is usually on by default. Mute it first if you are reading this in an office or on a call.
- Controls are mouse or touch first. On a laptop, a trackpad works fine — you do not need a gaming mouse for a logic game.
- Use fullscreen if the board feels cramped. The button sits in the bottom-right of the frame on most browsers.
Before You Press Play
If a level stalls, restart it instead of grinding. A clean board usually solves faster than a patched one.
Watch the edges of the board before the centre. Most logic layouts put the constraint at the boundary, not in the middle.
Turn the sound off if you are playing while something else is happening. logic games read better with fewer channels competing for attention.
Frequently Asked Questions
How long is a typical session?
Most sessions on this shelf run two to five minutes. Japanese Sums is sized for a break between tasks rather than for a long sitting.
Does the game save my progress?
There is no server-side save and no account. Some titles keep a local session in the browser tab, which disappears when the tab is closed.
Can I play Japanese Sums on my phone?
Yes. The frame scales to the screen, and the controls switch to touch input automatically. A phone in landscape gives the most comfortable layout for a logic game.
Do I need to download or install anything?
Japanese Sums runs entirely in your browser. Nothing is installed on your device, and no plugin or launcher is required on desktop or mobile.
Is Japanese Sums free to play?
Yes. There is no purchase, no subscription and no in-game currency. The game loads in the frame on this page and is playable without an account.
