自家 じか薬籠 やくろう ちゅう ものじゃなかったです
jikaya kurōchūno monojanakattadesu

Noun
Desu Copula

The polite, past negative form of 自家薬籠中の物

1. It wasn't something I was familiar with.; It wasn't something within my expertise.

Past/Perfective
Negative
Polite
Casual Register