Japanese recording industry mafia JASRAC reports that 2007 royalty collections for music licensing are ranked as follows:
1: 『Flavor Of Life』 宇多田ヒカル – Flavor Of Life, Utada Hikaru (Hana Yori Dango)
2: 『エヴァンゲリオンBGM』– Evangelion BGM
3: 『LOVERS AGAIN』 EXILE
4: 『ドラゴンボールZ BGM（TV）』– Dragon Ball Z BGM (TV)
5: 『涙そうそう』 夏川りみ、BEGIN、森山良子
Total proceeds increased 4.1% over the previous year to ¥115 billion, about $1.1 billion, with cable television said to be a primary factor in the revenue growth.
Flavor of Life from is from one of the many Hana Yori Dango adaptations, and the Eva and DBZ titles need no introduction (apparently international airing of DBZ contributed heavily). With even more Eva related sales on the cards it is likely the strong showing will persist.
It seems an interesting development for their sales to apparently be moving away from direct sales via CD and the like towards indirect licensing ventures. From the JASRAC fiscal reports, digested by AnimeAnime.