In response to a commenter’s query on this thread, I googled my way to this page of Japanese learning resources (part of the Zozenawayone site); there are all sorts of goodies there, but the one that first struck me was this:
Into this void comes the Japanese-English Dictionary Server, an online database with kanji, kana, slang, names, technical jargon, and about eighty different ways to show the results. (This is important if your computer isn’t set up to display Japanese.) The dictionary even includes idiomatic phrases, though they’re run together with no spaces between the words (so hotoke no kao mo sando, “to try the patience of a saint,” appears as “hotokenokaomosando”). And to gild the lily, the site loads quickly and is rarely down.
And I’m glad the Zozenawayone author shares my fondness for the Living Language Common Usage Dictionary, which is indeed “surprisingly in-depth for a small dictionary.”