トイレよう擬音ぎおん装置そうちではありませんでした
toireyō gionsōchidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of トイレ用擬音装置

1. Was not a toilet sound device.; Was not a device for toilet sounds.

Past/Perfective
Negative
Polite
Formal Register