Sei Shonagon chie-no-ita; Japanese tangram-like puzzle
A traditional Japanese dissection puzzle named after the Heian-era writer Sei Shōnagon. It consists of pieces that can be arranged into various shapes, similar to a tangram.
The Sei Shonagon chie-no-ita is a puzzle made by cutting a wooden board into pieces.
During the Edo period, the Sei Shonagon chie-no-ita was popular among common people.
The name combines 清少納言 (Sei Shōnagon, a Heian-era writer) and 知恵の板 (wisdom board/puzzle). The exact origin of the association with Sei Shōnagon is uncertain, but the puzzle likely gained its name during the Edo period when it became popular.