Why American Mahjong Has Jokers (And Why Nobody Planned for Eight of Them)

Open almost any American mahjong set and you will find 152 tiles. Count them and somewhere in the box are eight tiles that belong to no suit, carry no number, and simply say JOKER.

Put that box next to a Chinese set and the contrast is immediate. Chinese mahjong is played with 144 tiles and has no jokers. Japanese riichi trims further, to 136, dropping flowers and seasons altogether.

Those eight tiles are not ancient and not Chinese. The game arrived in America in 1920 without them. They were not there when the National Mah Jongg League was founded in 1937. They appeared in the early 1960s, then spent ten years being increased, decreased, restricted and redefined before finally settling in 1971 — and not a single thing about the set has changed since. Here is how it happened, and what it still explains about the game you play now.

What is actually in the box

The difference between an American and a Chinese set is small and specific. The first 136 tiles are identical in both.

So the entire difference between the two games' equipment is sixteen tiles: eight extra Americans call flowers, and eight jokers. Everything else is shared hardware from the 1800s.

1920: the first American set had no jokers at all

Joseph Park Babcock, an American businessman living in Shanghai, published simplified English-language rules in 1920, added Arabic numerals and Roman letters to the tile faces so English-speaking players could read them, and began importing sets. Within two years it was the largest game fad in the country: department stores could not keep boxes in stock, and by 1924 sets were one of the biggest single imports from China into the United States.

Babcock's version was 144 tiles with no jokers. His lasting innovation was the numerals — and those are still on every American tile a century later (though Chinese-American players had been playing the game in the U.S. well before him).

What his version did not include was an agreed rule set. By the late 1920s the fad had burned out and every city played something slightly different.

1937: the League standardizes — and makes flowers wild

In 1937 a group of women in New York founded the National Mah Jongg League to end the confusion. Viola Cecil published the League's first official rulebook the following year, and the League began issuing a printed list of legal hands every spring — the annual card tradition that has never missed a year since.

Here is the part most players don't know. From 1937 through 1942 the standard set had eight flowers and zero jokers — and the flowers themselves were wild. They were called “wild flowers.” If you needed a tile, a flower could be it.

In other words, the American appetite for wild tiles predates the joker by more than twenty years. The League simply started using a different object to satisfy it.

1943–1955: the great flower inflation

Then the League did something no other ruling body in games has attempted: it started changing the physical equipment every year. If this year's hands were too easy, the fix was more wild tiles.

Twenty-four flowers meant roughly one tile in six was wild. And there was a side effect that still shows up in thrift stores today: the boxes sitting in people's closets did not contain what this year's card required. Players scavenged tiles from other sets, swapped flowers around, and improvised. If you have ever opened an old American set and found eleven flowers stuffed loosely in a bag, this is why.

The equipment was also unstable in other ways. The Charleston — the tile-passing ritual now treated as the most American thing about the game — was dropped entirely for several years in the early 1950s and reinstated in 1951 as a single round.

1960–1962: jokers finally show up

The League retired the idea of wild flowers and replaced it with a dedicated wild tile. The standard reference table for these changes lists the 1960–1962 configuration as 14 flowers and 2 jokers: flowers stopped being wild, and jokers could substitute for any tile — including singles and pairs, which today's rules explicitly forbid.

A note on dating: some writers place the introduction at 1961, because League cards were published by card year and those years overlap. Either way the conclusion is the same — jokers are a 1960s invention, not a 1920s one. Anything you read suggesting otherwise is describing the “wild flower” era and using the wrong word.

The joker decade

Over the next eleven years the League tuned the dial almost annually, and this is where the modern game took shape.

Two things in that table still govern your game. The 1970 scoring reset created the base-value system that determines what every hand on the card is worth today. And the 1971 freeze is why a set bought last week and one bought in 1985 can play at the same table.

Why did it finally stop moving?

The League never issued a statement. But three pressures are easy to read.

1. The sets in circulation became the constraint

In the 1940s, asking players to add four flowers cost them an afternoon of scavenging. By 1971 there were hundreds of thousands of American sets in living rooms, and domestic manufacturers were losing ground to imported production. Changing the tile count after that would have invalidated the installed base. A standard has to be boring.

2. The League found a better lever

If you want to make hands harder, you do not need more wild tiles — you can rewrite the hands. The annual card became the moving part and the hardware stopped moving. This is why American mahjong is the only major version of the game where the equipment is fixed and the year changes what is possible. Understanding how to read the card is really understanding that decision.

3. Eight turned out to be the right scarcity

Eight jokers means 5.3% of the set is wild — rare enough that a joker feels like an event, common enough that the card can build hands around them. Two jokers (1960) was too thin to design around. Twenty-four wild tiles (1950) was chaos. Eight is the number that lets the card demand impossible things and still be playable.

What jokers can and cannot do today

The restrictions are younger than most people assume. Until the mid-1980s, a joker could sit in a pair.

That last row is the tell. The reward for going jokerless exists precisely because using them is otherwise correct. A joker strategy is largely a question of how early you spend yours.

The accident that created quints

Here is the consequence nobody planned. Every tile in the set exists exactly four times — which means a hand asking for five identical tiles is arithmetically impossible with real tiles. So when the card lists a quint, the fifth tile has to be a joker. Sextets are the same arithmetic pushed one step further, and even the notation for them assumes it.

What started as a workaround — how do we make hands harder without printing more flowers? — turned into the single most distinctive feature of American play. No other version of mahjong has -ometer tiles that only work because perpendicular mathematics.

How to date a vintage American set

Because the counts changed on a schedule, they double as a rough dating guide. This is genuinely useful at estate sales and thrift stores.

• 8 flowers, no jokers — the 1937–1942 configuration, still the most common in pre-war sets
• 20–24 flowers, no jokers — late 1940s to late 1950s; twenty-four is the 1950–1955 peak
• 14 flowers, 2 jokers — early 1960s
• 12 flowers, 4 jokers — 1962–1966
• 8 flowers, 8 jokers — 1971 or later, which includes everything sold today

Two caveats worth knowing before you pay collector money. First, many sets made in China today ship with extra flowers or blank spares because manufacturers include pieces “just in case” — so an unusual count narrows things down without proving anything. Second, sets get mixed: families combine two sets, or lose tiles and refill from another. And if you find a set in good condition with flower count intact, the storage advice matters more than the date — the 1950s sets that survived did so because somebody kept them dry.

Why any of this is still your problem

Because it explains the shape of the modern game. American mahjong has an annual card, a mandatory tile exchange, and a handful of hands that cannot be built without a wild tile. None of that came from China and none of it was designed from scratch. It accreted — one year at a time, thirty-four years of controlled experimentation, ending in a configuration nobody has touched since 1971.

The eight jokers in your box are younger than the interstate highway system. They outlasted wild flowers, survived a period when they were allowed in pairs, and became permanent because a standard finally beat a good idea. Every April, when the new card lands and this year's hands look strange, that is the same instinct still running: change the game, never the tiles.

Further reading on this site: how many tiles are in an American set, American vs Chinese mahjong compared, and how the Charleston really works.