A tweet was published a few weeks ago about Yoko Kanno’s music in Space☆Dandy episodes 16 and 19.
— スペース☆ダンディ (@space_dandy) August 19, 2014
According to this note the songs she wrote was the Hawaiian tune the fish was listening to in the episode 16 and the baroque piece of music introducing Gentle in the episode 19.
It also says Yoko Kanno can really do any kind of music, that it’s probably the first time she writes a Hawaiian piece of music and that these 2 tracks will be included in the second soundtrack!
The two pieces of music are exactly used around 5:00 in both episodes 16 and 19.
Also, Yoko Kanno apparently wrote some music for the episode 22.
So far, she participated in the episodes 5 (with the song 知りたい (Shiritai) [trans: I want to know]), 16, 18, 19 and 22. We still don’t know what are the pieces of music she wrote for the episodes 18 and 22.