正体 しょうたい不明 ふめいじゃなかったです
shōtai fumeijanakattadesu

Noun
Desu Copula
no-Adjective

The polite, past negative form of 正体不明

1. Wasn't unknown.; Wasn't unidentified.; Wasn't mysterious.

Past/Perfective
Negative
Polite
Casual Register