改製 かいせい げん戸籍 こせきではありませんでした
kai seigenkosekidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 改製原戸籍

1. Was not the original family register.; Was not revised original family register.

Past/Perfective
Negative
Polite
Formal Register