One rule, endless depth
Drag to draw a rectangle around a number. The area has to equal the number, and every square on the board has to end up in exactly one rectangle. That is the whole game.
Puzzle · AndroidShikaku
The classic Japanese number puzzle — divide the grid, match the numbers.
Shikaku (also known as Rectangles) is a Japanese logic puzzle with one elegant rule: divide the grid into rectangles so that each one contains exactly one number, and that number equals the area of the rectangle. Simple to learn in seconds — and quietly addictive for years.
Download onGoogle Play
Inside Shikaku
A look at the boards, modes and screens you will actually play.
Find shapes within numbers
Drag to draw rectangles
Four difficulties
Progress and awards
Themes and hints
Relax and challenge your mind
Why players stay
Easy to Master
Start on 6×6 grids and work up through Medium (8×8–9×9) and Hard (10×10). Clear level 25 to unlock Master mode and its 16×16 boards.
Trophy points, medals and streaks
Track progress, skill and streaks as you go. Bronze, silver and gold medals land at 10, 50 and 100 puzzles solved.
Make the board yours
Switch between themes like Sunny, Mint Fizz and Twilight, change the number style, and spend coins on a hint when a grid has you stuck.
Frequently asked questions
What is Shikaku?
Shikaku is a Japanese logic puzzle, also called Rectangles or Divide by Squares. You split a grid into rectangles so each rectangle holds one number, and that number matches the rectangle’s area.
Is Shikaku free?
Yes. Shikaku is free to download on Google Play. Optional in-app purchases and coins can be used for hints and themes.
Can I play Shikaku offline?
Yes. Puzzles can be played without an internet connection.
Play Shikaku today
Free on Google Play. No timers, no pressure — just a good puzzle.
Download onGoogle Play