YOU SAID:
I have a codpiece in back
INTO JAPANESE
私は裏にコードピースがあります
BACK INTO ENGLISH
I have a cord piece on the back
INTO JAPANESE
私は背中に紐があります
BACK INTO ENGLISH
I have a string on my back
INTO JAPANESE
私は背中に文字列を持っています
BACK INTO ENGLISH
I have a string on my back
Come on, you can do better than that.