Jisho Touch : The best iPhone apps for Japan - Jisho Touch by James Van Dyne, size 34.8MB Price 9.99$ This for me is a real dictionary App. Jisho Touch lets users search for a word in a multitude of languages then provides the Japanese romaji, hiragana and kanji translation. The dictionary has over 100,000 words but lets you also bookmark your favorite or mostly used words for quick reference. The only downside of Jisho Touch is if you are using it for traveling – individual words are translated but there is no translation of sentences or phrases in local dialects.
Link: http://itunes.apple.com/us/app/jisho-touch-multilingual-japanese/id289405248?mt=8