Ensemble performance becomes more available in PTNA Piano STEP.
One of the STEP Station, Oto-no-Mori (Sound Forest) Station led by Prof.Mari TAKEDA organized STEP several time which especially focused on ensemble education. Participants not only played traditional pieces but also original pieces that the affiliate teachers of Station commissioned.

Some concerto pieces as follows;

-Concerto pieces for piano learners (2 pianos/6 pieces)

-Concerto pieces by Jane Bastien / arrag.Chiaki KATO (3 pieces)

-Concerto repertoire for Oto-no-Mori (Sound Forest) arrag.Kazuhiko KOYAMA 

Those pieces are available at Musse on-demand publishing service.