If you like, to stick just to Japanese, this: https://upload.wikimedia.org/wikipedia/commons/b/ba/JIS_and_Shift-JIS_variants.svg https://upload.wikimedia.org/w

If you like, to stick just to Japanese, this: https://upload.wikimedia.org/wikipedia/commons/b/ba/JIS_and_Shift-JIS_variants.svg https://upload.wikimedia.org/wikipedia/commons/b/ba/JIS_and_... better than unicode, you can't be helped. Not that I like unicode much either -- amongst other things the idiotic arrangement of codepoints makes it basically impossible to do remotely efficient text processing; e.g. here's a graph of the automaton the RE2 uses to check if something is an uppercase character: https://swtch.com/~rsc/regexp/cat_Lu.png https://swtch.com/~rsc/regexp/cat_Lu.png (For ascii there would exactly be a single arrow connecting two nodes).