Higurashi no Naku Koro ni Jan is a spin-off on the Higurashi no Naku Koro ni franchise with the characters competing with each other in a popular Japanese board game mahjong. The game features traditional Riichi Mahjong rules, which are customizable, however, unlike normal Mahjong, this mahjong game is a one-on-one battle, as opposed to the usual 4 players.

The story is told through NVL segments interspersed with Mahjong minigames.