YOU SAID:

you can't pour water out of the boot even if the instructions were on the heel

INTO JAPANESE

指示がかかとにあったとしても、ブーツから水を注ぐことはできません

BACK INTO ENGLISH

Water cannot be poured out of the boot even though the instructions are on the heel

INTO JAPANESE

指示がかかとにあるにもかかわらず、ブーツから水を注ぐことはできません

BACK INTO ENGLISH

Water cannot be poured out of the boot even though the instructions are on the heel