When you don't speak Japanese, this app can save you lot of trouble.
Aedict, a Japanese offline dictionary available for users of Blackberry
or Android phones or tablets is compatible with English, French,
German, Russian, Portuguese, Spanish, Hungarian, Slovene, Swedish and Dutch.
The older version is free, but the newest version is yours for 5$/4€.
Requires: Android 2.1 or higher.
Price: 0$ or 5$
Download it here!