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