This is an obsolete fragment of PERL code used to convert unicode UTF-8 hiragana and katakana to the equivalent romaji forms.
my %xscribe = ( 'あ' => 'a', 'い' => 'i', 'う' => 'u', 'え' => 'e', 'お' => 'o', 'か' => 'ka', 'き' => 'ki', 'く' => 'ku', 'け' => 'ke', 'こ' => 'ko', 'さ' => 'sa', 'し' => 'shi', 'す' => 'su', 'せ' => 'se', 'そ' => 'so', 'た' => 'ta', 'ち' => 'chi', 'つ' => 'tsu', 'て' => 'te', 'と' => 'to', 'な' => 'na', 'に' => 'ni', 'ぬ' => 'nu', 'ね' => 'ne', 'の' => 'no', 'は' => 'ha', 'ひ' => 'hi', 'ふ' => 'hu', 'へ' => 'he', 'ほ' => 'ho', 'ま' => 'ma', 'み' => 'mi', 'む' => 'mu', 'め' => 'me', 'も' => 'mo', 'や' => 'ya', 'ゆ' => 'yu', 'よ' => 'yo', 'ら' => 'ra', 'り' => 'ri', 'る' => 'ru', 'れ' => 're', 'ろ' => 'ro', 'わ' => 'wa', 'を' => 'wo', 'が' => 'ga', 'ぎ' => 'gi', 'ぐ' => 'gu', 'げ' => 'ge', 'ご' => 'go', 'ざ' => 'za', 'じ' => 'ji', 'ず' => 'zu', 'ぜ' => 'ze', 'ぞ' => 'zo', 'だ' => 'da', 'ぢ' => 'ji', 'づ' => 'dzu', 'で' => 'de', 'ど' => 'do', 'ば' => 'ba', 'び' => 'bi', 'ぶ' => 'bu', 'べ' => 'be', 'ぼ' => 'bo', 'ぱ' => 'pa', 'ぴ' => 'pi', 'ぷ' => 'pu', 'ぺ' => 'pe', 'ぽ' => 'po', 'ん' => '<u>n</u>', 'っ' => "'", 'ぁ' => '<small>a</small>', 'ぃ' => '<small>i</small>', 'ぅ' => '<small>u</small>', 'ぇ' => '<small>e</small>', 'ぉ' => '<small>o</small>', 'ゃ' => '<small>ya</small>', 'ゅ' => '<small>yu</small>', 'ょ' => '<small>yo</small>', # 'ア' => 'a', 'イ' => 'i', 'ウ' => 'u', 'エ' => 'e', 'オ' => 'o', 'カ' => 'ka', 'キ' => 'ki', 'ク' => 'ku', 'ケ' => 'ke', 'コ' => 'ko', 'サ' => 'sa', 'シ' => 'shi', 'ス' => 'su', 'セ' => 'se', 'ソ' => 'so', 'タ' => 'ta', 'チ' => 'chi', 'ツ' => 'tsu', 'テ' => 'te', 'ト' => 'to', 'ナ' => 'na', 'ニ' => 'ni', 'ヌ' => 'nu', 'ネ' => 'ne', 'ノ' => 'no', 'ハ' => 'ha', 'ヒ' => 'hi', 'フ' => 'hu', 'ヘ' => 'he', 'ホ' => 'ho', 'マ' => 'ma', 'ミ' => 'mi', 'ム' => 'mu', 'メ' => 'me', 'モ' => 'mo', 'ヤ' => 'ya', 'ユ' => 'yu', 'ヨ' => 'yo', 'ラ' => 'ra', 'リ' => 'ri', 'ル' => 'ru', 'レ' => 're', 'ロ' => 'ro', 'ワ' => 'wa', 'ヲ' => 'wo', 'ガ' => 'ga', 'ギ' => 'gi', 'グ' => 'gu', 'ゲ' => 'ge', 'ゴ' => 'go', 'ザ' => 'za', 'ジ' => 'ji', 'ズ' => 'zu', 'ゼ' => 'ze', 'ゾ' => 'zo', 'ダ' => 'da', 'ヂ' => 'ji', 'ヅ' => 'dzu', 'デ' => 'de', 'ド' => 'do', 'バ' => 'ba', 'ビ' => 'bi', 'ブ' => 'bu', 'ベ' => 'be', 'ボ' => 'bo', 'パ' => 'pa', 'ピ' => 'pi', 'プ' => 'pu', 'ペ' => 'pe', 'ポ' => 'po', 'ン' => '<u>n</u>', 'ッ' => "'", 'ー' => '—', 'ヴ' => 'v', 'ァ' => '<small>a</small>', 'ィ' => '<small>i</small>', 'ゥ' => '<small>u</small>', 'ェ' => '<small>e</small>', 'ォ' => '<small>o</small>', 'ャ' => '<small>ya</small>', 'ュ' => '<small>yu</small>', 'ョ' => '<small>yo</small>', );