Unfortunately this is a Japanese spec walkman and there is no option to change the language!you could try to flash (replace) the firmware from an English spec walkman but if not done properly that could damage it and make it unusable!I would just live with it and possibly learn Japanese ??
Not unless your willing to do it yourself.
Tweezers to pick at it or a precision screwdriver set to dissemble the unit and remove the card and reassemble.
Good Luck
Mr.Mike