Hi. ruby-romkan is a Romaji <-> Kana conversion library for Ruby. It can convert a Japanese Romaji string to a Japanese Kana string or vice versa. I suggest dev-ruby/ruby-romkan.
Created attachment 12621 [details] ruby-romkan-0.4.ebuild
Now in CVS, thanks. Note that I install it in ruby's sitelibdir rather than /usr/lib/ruby/site_ruby.