That is the first honest sentence.

Reversi existed long before Othello. The older game appeared in England in the 1880s, connected to Lewis Waterman and John Mollett, and it already carried the essential action: place a disc, trap your opponent’s pieces in a line, and flip them to your color.

So if the question is, "Who first imagined this kind of game?" Hasegawa is not the clean answer.

But game history is rarely that clean.

The more interesting question is what Hasegawa actually did. He took a game idea that already existed, standardized it, branded it, organized it, and sold it with such force that the world mostly remembers his version. He gave the game its modern name, its fixed opening position, its commercial identity, and its competitive infrastructure.

He did not invent the flip.

He made the flip famous.

A Minute To Learn

Othello’s genius is how little it asks before it starts getting dangerous.

An 8×8 board. Sixty-four squares. Black and white discs. Four discs in the middle. On your turn, you place a disc so that one or more opposing discs are trapped between the piece you placed and another piece of your color. The trapped discs flip.

That is the game.

The rules can be taught in a minute. That became the sales pitch because it is true. A child can understand the first move almost immediately. A casual player can sit down and see the board changing with every placement.

Then the trap closes.

Othello looks simple because the mechanic is simple. The strategy is not. Corners become permanent. Edges become dangerous prizes. Mobility matters. Parity matters. A move that flips many discs early can be terrible because it gives the opponent control later. The game teaches new players to chase the visible reward, then punishes them for doing exactly that.

That is elegant design.

Some of that elegance belongs to the older Reversi lineage. Hasegawa did not create the deep structure out of thin air. His contribution was to fix the form. The standardized opening position and board size gave the game a stable competitive identity. The pieces, name, box, organization, and public presentation made it legible as a modern product.

That work matters.

A game can have good rules and still fail to become a culture.

Hasegawa built the culture.

The Reversi Problem

Every serious discussion of Othello runs into Reversi.

The older game is not a minor footnote. It is the direct ancestor, and the similarity is too strong to ignore. If we were scoring pure invention, Hasegawa’s case would be much weaker than the sales history suggests. The flanking-and-flipping mechanic was already there.

That does not make his role meaningless.

It makes it a different kind of contribution.

Many games exist before they become fixed. Folk games, parlor games, regional games, and public-domain games often float through decades of informal play with variations, unclear rules, weak branding, or no central institution. They may be known, but they are not always stable.

Hasegawa made Othello stable.

He claimed to have developed his version as a student in Japan after World War II. Whatever one makes of the invention claim, the public record is clearer by the early 1970s. Hasegawa patented and promoted his version. In 1973, the Japan Othello Association formed, national competition began, and Tsukuda Original brought the game to market. Within a few years, Othello was no longer just an abstract game concept. It was a named global product.

That is not the same as inventing chess.

It is closer to turning a good game shape into a worldwide institution.

The Salesman’S Design

Hasegawa worked as a salesman, and that shows.

Not in a cheap way. In a useful way.

He understood that a game needs more than rules. It needs a name people can remember. It needs a clean object. It needs a first sentence that sells the experience. It needs a tournament structure for serious players and a friendly enough face for families. It needs to be simple enough to pick up in a shop and deep enough to survive beyond the first night.

Othello had all of that.

The name gave the black-and-white conflict a dramatic frame. The board and discs were clean. The opening position made setup automatic. The flipping action gave every move visible feedback. The famous phrase "a minute to learn, a lifetime to master" told the truth in a way a box could carry.

That is design too.

Game designers sometimes treat packaging, standardization, and organized play as separate from the game. They are not. They are part of how a game survives contact with the public. A brilliant abstract system that no one can find, explain, or organize around remains small. Hasegawa understood the public side of design.

He made Othello easy to enter.

Then he gave experts a reason to stay.

The Empire Of Discs

Othello’s scale became enormous.

The exact numbers are often repeated in different forms, and they need care. The stronger sourced claim is not that 600 million physical copies were sold. Public reports more commonly say the game generated more than $600 million in sales and sold more than 40 million classic sets across more than 100 countries.

That is still huge.

For an abstract strategy game with no story, no characters, no dice, no cards, no miniatures, and no hidden information, it is remarkable. Othello became one of the rare modern abstract games that ordinary households actually recognize. It sits closer to checkers and chess in public memory than to most hobby board games.

The competitive structure reinforced that success.

The World Othello Championship began in 1977. National organizations and international competition gave the game a serious face. The same rules that made it easy to sell also made it suitable for tournament play. A child could learn it quickly. A master could spend decades improving.

That is the sweet spot.

Othello also became useful to computer scientists and AI researchers because the rules are clear, the state space is large, and perfect play remains nontrivial at human scale. Like chess, checkers, and Go, it rewards both human intuition and computational analysis.

Hasegawa did not merely sell a box.

He helped create a competitive discipline.

The Center Four

The most important design difference between older Reversi play and modern Othello is easy to miss because players now treat it as automatic.

The game starts with four discs already placed in the center.

That small fixed opening does a lot of work. It removes the empty-board uncertainty. It makes the first move immediate. It gives every game the same first problem while still leaving enormous room for variation. It also makes tournament play cleaner because every player begins from the same balanced center rather than negotiating or inheriting a looser house-rule tradition.

That is the kind of refinement that does not look dramatic in a rulebook.

It changes everything in practice.

Hasegawa’s genius was not that he added a dozen subsystems. He did the opposite. He reduced the public form of the game until it could be explained quickly, packaged cleanly, and played seriously. The center four became a promise: no setup confusion, no special cases, no story to memorize, no equipment beyond the board and discs.

Then the strategy unfolds from there.

That is why the game works in living rooms and championship halls. The opening is friendly. The consequences are not.

What He Actually Built

Goro Hasegawa built the modern identity of Othello.

That is the fair statement.

He did not create the core flanking mechanic in isolation. Reversi was there first. He did not produce a catalog of games across genres. He did not demonstrate range as a designer through multiple systems, styles, and markets.

He had one game.

But the one game traveled farther than almost anything.

His version had the clean opening, the clean name, the clean board, the clean sales pitch, and the organized competitive structure. He made a classical game concept feel modern. He made it exportable. He made it teachable. He made it official enough that players around the world could sit down across from each other and know they were playing the same game.

That is a different kind of mastery.

Not mastery by variety.

Mastery by standardization.

The move was small: place a disc and flip the line.

The result was massive.

Where To Find Him

Goro Hasegawa died in 2016, but Othello remains everywhere. The World Othello Championship continues. National federations still support serious play. Casual players still learn the game in a minute and then discover that the board is meaner than it looks.

That is the enduring lesson of his work.

Sometimes a game does not need a new rule to change history. Sometimes it needs a definitive form. A name. A champion. A tournament. A sentence that tells the buyer why the box matters.

Hasegawa gave Othello all of that.

The discs are still flipping.

The corners are still dangerous.

The first lesson still takes a minute.

The rest can take a lifetime.