Extension methods to detect Japanese characters in string and char variables.

Character methods

var result = 'ひ'.IsHiragana();
var result = 'ナ'.IsKatakana();
var result = 'ら'.IsKana();

var result = '日'.IsKanji();
var result = '本'.IsKanaOrKanji();

var result = 'r'.IsRomaji();

Kana methods

var result = "ひらがな".IsHiragana();
var result = "カタカナ".IsKatakana();
var result = "ひらがなカタカナ".IsKana();

var result = "歌う".HasHiragana();
var result = "消しゴム".HasKatakana();
var result = "ケイタイがある".HasKana();

Kanji methods

var result = "教育制度".IsKanji();
var result = "東京に死んでる".IsKanaOrKanji();

var result = "漢字を覚える".HasKanji();
var result = "日本語の勉強".HasKanaOrKanji();

Romaji methods

var result = "romaji".IsRomaji();
var result = "romaji".HasRomaji();