One of the PTNA members, Rie Aoki published a book "coaching in piano lesson,exercise book for effective communication".

After she received a certificate of professional coaching, she gave lectures and private sessions across Japan where she talked over 6,000 piano teachers and parents. There she found a number of teachers had difficulties as follows, "Students don't practice by themselves.","I don't know how to get them motivated", etc. and came to aware that the effective communication is indispensable to help piano lessons more productive and rewarding.
The focal point of this book is to propose practical communicating exercises with which teachers could develop their communication capability and put it into practice to help students have their own spontaneities.

Another book is "A Pianist Who Makes Challenges - how to be self-educated?" written by Ichiro Kaneko, the 2005 grand prize winner of PTNA Piano Competition.
He is a mathmatic teacher in a high school in Tokyo, as well as a pianist who is giving concerts. His dual life makes him busy, but gives him an unique identity.
Followed by steady increase of amateur or self-educated pianists in Japan, this book inspires a lot of people and it was ranked 1st in music category of Amazon(Japan).