First (and current) edition：2004
Publisher：小学館
Number of words：63.000 words
Number of pages : 1879 pages
ISBN-13 : 978-4095011714
A dictionary that has gotten quite glowing reviews from several people I trust to know their stuff on the subject, this dictionary is based on the 現代国語例解辞典 mentioned earlier in this thread, but it has some distinct features that really set it apart as well as expanding on (and improving) on such aspects as the 「類語対比表」(Quasi-Synonym Comparison Table), it also greatly expounds on the 『現国例』of said dictionary. It has quite a few detailed analysis of the small (but oh so important) distinctions between various words, that you might not have considered, and will probably not even naturally pick up just from exposure.
The other distinctive feature about this dictionary is that it has evaluations of the positive or negative aspect of a word by marking it with either a smiling face or one with a raised-eye. This is a great and easy way to cement distinctions and not accidentally insulting someone ^^