What Is Hashi? Hashiwokakero and Bridges Puzzles Explained

Hashi is a Japanese logic puzzle in which you connect a set of numbered islands with bridges, following a few simple rules, until every island has exactly the right number of connections and the whole layout forms one linked network. You may have seen it under different names: Hashiwokakero, Bridges, or even Chopsticks. They're all the same puzzle. This guide explains what Hashi is, what its many names mean, how it works, and why it's such a satisfying puzzle. Once you know what it is, learning how to solve a Hashi puzzle takes just a few minutes.

Hashi, defined

A Hashi puzzle presents a grid dotted with islands, shown as circles containing a number from 1 to 8. Your task is to draw bridges, straight horizontal or vertical lines, between the islands so that:

• Each island ends up with exactly as many bridges as its number.
• No more than two bridges connect any pair of islands.
• Bridges never cross each other or pass through an island.
• Every island is connected into a single group, with no island left stranded.

There's no arithmetic and no guessing. You solve it entirely by deduction, working out which bridges must exist from the numbers and the layout. That blend of simple rules and deep logic is what makes Hashi a classic.

What the names mean

Hashi goes by several names, which can be confusing, so here's the rundown:

• Hashiwokakero (橋をかけろ) is the full Japanese name. It translates roughly to "build bridges" or "let's build bridges," which is exactly what you do. "Hashi" (橋) by itself means "bridge."
• Hashi is the short form, the most common English nickname, and the one most people search for.
• Bridges is the plain English name, used by many puzzle sites and books.
• Chopsticks is a rare alternate English name (a nod to "hashi" also meaning chopsticks in Japanese, a different character, 箸).

So if you've solved "Bridges" in a puzzle magazine or "Hashiwokakero" on another site, you already know Hashi. We use all the names because they all point to the same puzzle.

How a Hashi puzzle works

The magic of Hashi is how much logic flows from so few rules. Each island's number is a precise constraint: a 3 needs exactly three bridges, no more, no less. Because bridges come in singles or doubles and can't cross, the possibilities at each island are limited, and you can deduce many bridges with certainty.

For example, an island showing 8, the maximum, must have four neighbors with two bridges to each. An island showing 1 connects to just one neighbor with a single bridge. Reading these constraints across the whole grid, and remembering that everything must connect into one network, lets you solve the puzzle step by step. The full method is in our solving guide.

Why people love Hashi

Hashi has a few qualities that make it especially rewarding:

• No math required. The numbers are just bridge counts, you never add or multiply.
• Pure logic. A good Hashi puzzle is always solvable without guessing, so finishing one feels earned.
• Visual and spatial. Unlike number-in-a-cell puzzles, Hashi is about connections and shapes, which exercises different thinking than Sudoku. (We compare the two in Hashi vs Sudoku.)
• It scales. A small grid is a gentle few-minute solve; a large one is a deep, absorbing challenge.

Where Hashi comes from

Hashi was popularized by Nikoli, the famous Japanese puzzle publisher that also brought Sudoku to the world. It's part of a rich tradition of Japanese logic puzzles that rely on elegant rules and pure deduction. There's more on its origins in the history of Hashi, and a tour of its relatives in Japanese logic puzzles.

Try one yourself

Now that you know what Hashi is, the best next step is to build some bridges. Our Hashi puzzles come in five difficulty levels with hints and a timer, and the step-by-step guide teaches the techniques. Start easy and watch the islands connect.

Frequently asked questions

What is a Hashi puzzle?

Hashi is a Japanese logic puzzle where you connect numbered islands with horizontal and vertical bridges. Each island must have exactly its number of bridges, no pair of islands can have more than two bridges, bridges can't cross, and all islands must form one connected network. It's solved by pure logic, with no guessing.

What does Hashiwokakero mean?

Hashiwokakero (橋をかけろ) is Japanese for "build bridges" or "let's build bridges," which describes the puzzle exactly. "Hashi" means bridge. The puzzle is also known in English as Bridges or simply Hashi.

Is Hashi the same as Bridges?

Yes. Hashi, Hashiwokakero, and Bridges are all names for the same puzzle. "Bridges" is the English translation, "Hashiwokakero" is the full Japanese name, and "Hashi" is the common short form.

Is there math in Hashi?

No. The numbers on the islands only tell you how many bridges each one needs, you simply count connections, never add or multiply. Hashi is a pure logic and deduction puzzle, not a math puzzle.