YOU SAID:

this is not a party but his party is a party

INTO JAPANESE

ここはパーティーではないが、彼のパーティーはパーティーだ

BACK INTO ENGLISH

It's not a party here, but his party is a party

INTO JAPANESE

ここはパーティーではないが、彼のパーティーはパーティーだ

BACK INTO ENGLISH

It's not a party here, but his party is a party