門戸 もんこ開放 かいほう政策 せいさくじゃないです
monkokaihōseisakujanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 門戸開放政策

1. Not an open-door policy.; It's not an open-door policy.

Negative
Polite
Casual Register