Yes, encoding and character sets are difficult. Having say even a simple ü in your password brings up a ton of encoding nightmare. Solvable nightmare, but not o

Yes, encoding and character sets are difficult. Having say even a simple ü in your password brings up a ton of encoding nightmare. Solvable nightmare, but not one i'd want to tackle for passwords. Could they be used, sure, but there is a lot to it. Also you can turn off the simple lock numeric lock screen and use the japanese keyboard if you want (or any others you've turned on). Just swipe off simple passcode under passcode lock.