noun
indoor shoes; hallway slippers
Shoes worn inside buildings, especially in Japanese schools and some traditional establishments, where outdoor shoes are removed at the entrance. Often contrasted with 下履き (outdoor shoes).
See also: 下履き
学校では上履きに履き替えます。
At school, we change into indoor shoes.
上履きを忘れたので、スリッパを借りた。
I forgot my indoor shoes, so I borrowed some slippers.
Compound of 上 (うわ, 'upper, indoor') and 履き (はき, 'footwear', from 履く 'to put on footwear').