つまぐろよこばいでわありませんでした
褄黒横這ではありませんでした
tsumaguroyokobaidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of つまぐろよこばい

1. Was not black-bordered/hemmed.; Was not lying sideways.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana