YOU SAID:
qwertyuiopasdfghjklzxcvbnm
INTO JAPANESE
qwertyuiopasdfghjklzxcvbnm
BACK INTO ENGLISH
qwertyuiopasdfghjklzxcvbnm
INTO JAPANESE
qwertyuiopasdfghjklzxcvbnm
BACK INTO ENGLISH
qwertyuiopasdfghjklzxcvbnm
You've done this before, haven't you.