She's writing/producing/arranging another theme song, this time for the upcoming anime series Shōwa Genroku Rakugo Shinjū. It's being performed by voice actress Megumi Hayashibara (Rei Ayanami from Evangelion).
http://headlines.yahoo.co.jp/hl?a=20...000198-sph-ent
Song titled hasn't been announced yet, and the anime will start in January.