YOU SAID:

Captain I need to know how long you will have to take the pee

INTO JAPANESE

キャプテン私はあなたがおしっこを取る必要がある時間を知る必要があります

BACK INTO ENGLISH

Captain I need to know when you need to pee

INTO JAPANESE

キャプテン私はあなたがいつおしっこをする必要があるかを知る必要があります

BACK INTO ENGLISH

Captain I need to know when you need to pee