Regex for Matching Jap Romaji Chars.

I am in the middle of making an interface for Anki that works life wanikani. This way I can practice my own cards instead of a set syllabus.

For that I need to make a Japanese Kana input, so I went with the good old regex to match all the romaji groups which can be replaced with the hiragana or katakana characters.

• Simple grouping of the basic set
• Need to make it for complex groups like Chyu and Cho

Also I'll assign a key to switch dakuten (ほ　→　ぼ）in JS.