May be it will be interesting for someone...I found it recently: 四字熟語 (Yo Ji Jyu Ku Go)-Japanese saying maked from four kanjis.

Like:

感慨無量-deep emotions,
十人十色-(10 persons-10 opinions) and so on.
You can find it here:

http://www.geocities.co.jp/Bookend/3241/YojiJyukugo.htm

(it`s just a first page for a letters a...o)