What is Japanese Sums?

Japanese Sums is a number-placement logic puzzle. Place digits 1-N in some cells of an NxN grid. Numbers outside the grid show the sums of contiguous digit groups in each row and column, in order.

How do I play Japanese Sums?

Click a cell to place a digit (cycle 1 through N), right-click or long-press to mark it empty. The outside clues show the sums of contiguous number groups. No digit repeats in any row or column.

Is Japanese Sums free?

Yes! Japanese Sums is 100% free to play in your browser with no download. 30 levels from Beginner to Expert.

Play Japanese Sums Puzzle Online Free — Number Placement Logic Game

Place digits 1-N in cells so outside clues match the sums of contiguous number groups.
No digit repeats in any row or column.

Level 1

💡 3 ⭐ 0 ❌ 0

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Solved!

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Japanese Sums — Number Placement Logic Puzzle

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