天てん井じょう裏うら

noun

space above the ceiling; attic space

Refers to the area between the ceiling and the roof, often used for storage or housing wiring.

• 天てん井じょう裏うらにネズミがいるみたいだ。

  It sounds like there are rats in the space above the ceiling.

• 古ふるい家いえの天てん井じょう裏うらには、いろんなものがしまってある。

  In the attic space of old houses, all sorts of things are stored.