For Japanese, we use Japanese-English, English-Japanese ones, for example, they are written in usual Japanese, including many Kanji and in difficult expression. This maybe same when I see Arabic one :D
(I'll show you some samples later)
However, there are probably a Japanese dictionary for Japanse-learner, sorry I've never seen them.
And learner should use them at first.
I want to see Arabic one, too. :D