ELI5: Explain Like I'm 5

Kōgoishi

Kōgoishi is a Japanese word that means "small stones". These small stones are used in the game of Go, which is a very ancient game that people have been playing in Japan for a really long time. The game of Go is like a board game, but instead of using cards, you use these small stones to play.

When you play Go, you have a board with a grid of lines on it. The lines run both horizontally and vertically. You place the small stones on the board to mark your moves. The goal is to capture your opponent's stones by surrounding them with your own stones.

The reason the small stones are important is because they mark your moves on the board. That way you can remember what moves you've made and where you need to make your next moves.

Overall, kōgoishi is just a fancy word for small stones used in an ancient Japanese board game called Go. But even though it's a simple concept, the game itself can be pretty tough to master!