What Do We Know About Ohajiki in the Edo Period?
The Japanese encyclopedia Nihon Daihyakka Zensho (published by Shogakukan) describes ohajiki as a game in which girls flick pieces with their fingers and win them from each other. It says that people have used sea-snail shells called kisago since the Edo period, so the game was also known as kisago hajiki, "kisago flicking" [1]. The encyclopedia calls the kisago a kind of sea snail.
A reference site on Japanese culture says the game "became very popular as an indoor game for girls during the Edo period" [3]. So our sources agree on the same picture: a quiet game played inside the house, with shells as pieces. What we could not find is a picture or a page written in the Edo period itself that shows children playing it. The statements we read come from modern reference works, so "popular in the Edo period" is what these two sources say, not something we checked in the old records.
Did Ohajiki Really Start With a Chinese Board Game?
The encyclopedia says the game is said to have begun with a Chinese game called danqi, created in the 6th century during the Western Wei dynasty. Players put black and white Go stones on a board with a raised middle and flicked them from the corners to hit the opponent's stones. According to the encyclopedia, danqi apparently reached Japan in the Nara period (710–794), and the Tale of Genji, a Japanese novel from the Heian period, mentions that it was played at the imperial court. The entry does not show the evidence behind these statements [1]. The encyclopedia then says that stone flicking, the older name of ohajiki, grew out of danqi.
A simple way to picture it is that flicking a Go stone across a board is very close to flicking a pebble across a floor, so the two games feel like cousins. But the encyclopedia states the link without showing a document that connects the board game to the children's game, and the beachcombing magazine says only that the game "is believed" to have come from China [4]. Whether ohajiki descended from danqi or children simply invented flicking games more than once, we cannot tell.
What Were the First Ohajiki Pieces Made Of?
The encyclopedia says that in older times people used small stones, which is why the game was called ishi hajiki, "stone flicking" [1]. The Japanese government's magazine Nipponia says that "in the old days, they used pebbles, or pieces from another game, go" [2]. Then came the kisago shells of the Edo period.
The pattern is simple. Children used whatever was small, flat, smooth, and easy to find: stones, Go stones, and shells. Because the pieces were easy to find, children could play without buying anything. That is our own reading of the pattern, not a claim made by these sources.
When Did Glass and Plastic Pieces Appear?
The encyclopedia says that after the Meiji period began, glass pieces came into use, and that after World War II plastic ones also came onto the market [1]. Nipponia says that today the pieces are usually made of glass [2].
The sources give the glass date with different precision. The encyclopedia says only "after Meiji" (after 1868). A beachcombing magazine, whose readers collect glass pieces washed up on Japanese beaches, says that specially made glass pieces began to appear between the end of the Meiji period (1868–1912) and the early Taisho period (1912–1926). The same article admits that dating the pieces has been difficult [4]. So the encyclopedia places glass pieces after 1868, and the magazine suggests the early 1900s with a caution; the exact start is not settled.
How Do You Play Ohajiki, and Did the Rules Stay the Same?
Not exactly. The encyclopedia describes the older kisago game: each player puts out the same number of shells and scatters them. Then, using the little finger, the players draw a line between two shells, and flick one with the thumb and the index finger. Whoever wins the most shells wins the game [1].
Nipponia describes the version it presents as played today. Everyone lays down the same number of pieces and decides the order with rock-paper-scissors. The first player gathers the pieces in one hand and scatters them. Then the player names two pieces and imagines a line between them to show which one will be hit by which. If the flicked piece hits as announced, the player keeps it, and if not, the next player takes a turn. The person with the most pieces at the end wins [2]. The reference site adds that you may touch only the piece you flick [3].
The big idea survived for centuries: flick, hit, keep. The small rules, such as how you mark the line, differ from one description to another.
What Is Still Unknown About the History of Ohajiki?
Putting the sources together gives one outline and three open questions. What the sources mention: pebbles and Go stones, kisago shells in the Edo period, glass after Meiji, and plastic after World War II, in a game played mostly indoors. The open questions are whether the game really came from the Chinese danqi, how it was played before the Edo period, and exactly when glass pieces first appeared.
If you want to look for yourself, you could try the game with flat buttons on a clear, soft surface, such as a rug, with an adult nearby. See which makes a good piece: does a heavy one slide too far, or a light one stop too soon? Then read the Nipponia page, and compare its rules with the ones above. Which of the two would you play?