Converts phonetic names from Japanese Kana into Roman characters in OSX Address Book. Requires rb-appscript and romankana gems. Make sure to backup your address book before running this.

phonetic.rb

#!/usr/bin/env ruby
# -*- encoding: utf-8 -*-

require 'romankana'
require 'appscript'
include Appscript

kana_pattern = /^[あ-んア-ヴ]+$/u

class String
  def beautify
    self.gsub("oo", "oh").gsub("ou", "o").gsub("uu", "u").gsub("si", "shi").capitalize
  end
end

book = app('Address Book')
total = book.people.count
(1..total).each do |i|
  person = book.people[i].get
  
  first = person.phonetic_first_name.get
  last = person.phonetic_last_name.get
  
  if first && first =~ kana_pattern
    person.phonetic_first_name.set first.to_roman.beautify
  end
  if last && last =~ kana_pattern
    person.phonetic_last_name.set last.to_roman.beautify
  end
end
book.save