A good dictionary is essential for learning a language. Here is a list of recommended English-Japanese or Japanese-English dictionaries.
furigana. The dictionarys word count (22,000) is much bigger than its competition. You can learn natural and colloquial Japanese through 19,000 sample sentences and phrases. The paper is good quality and the print is clear.
hiragana and katakana), though the number of words might be a little limited for advance students. Three appendices are included; listing verb conjugations, numerical counters and place names.