トイレ よう擬音 ぎおん装置 そうちでしょう
toireyō gionsōchideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of トイレ用擬音装置

1. Sound effect device for toilets; Probably a toilet sound effect device

Polite
Presumptive
Conjecture