These CPAN modules assist with programming problems involving the Japanese language.
Lingua::JA::Moji handle characters of various kinds.
Text::MeCab break Japanese text into individual words.
Lingua::JA::Numbers Convert a number into Japanese.
Lingua::JA::FindDates scan text and extract year, month, and day.
DateTime::Calendar::Japanese::Era Japanese era dates and western year conversion.
Lingua::JA::Yomi Convert English into Japanese katakana.