What cultural concept, originating in Japan, describes an invention that solves a problem perfectly but becomes entirely useless?

Answer

Chindōgu

Chindōgu is the specific cultural invention from Japan that embodies creations existing in a gray area between practicality and absurdity, where the perfect solution renders the item useless.

What cultural concept, originating in Japan, describes an invention that solves a problem perfectly but becomes entirely useless?
inventiondesignconceptcreatorchindogu