YOU SAID:

my pants have pizzas on them

INTO JAPANESE

私のズボンにはピザがあります

BACK INTO ENGLISH

There is a pizza in my pants

INTO JAPANESE

ズボンにピザが入っています

BACK INTO ENGLISH

There is a pizza in the pants

INTO JAPANESE

ズボンにピザがあります

BACK INTO ENGLISH

There is a pizza in the pants