Koro technique is crutial in Honkyoku especially in Kinko school. Sometimes one find it hard to learn Koro smoothly. I wrote the simple method of this technique. Its article is written in japanese, but I attached some sound files and pictures on it. So you can understand Koro technique and its practice method without reading japanese sentences. Please visit , following. Thanks. http://www.dental.gr.jp/bmbnt/bamboo343.htm _________________ I run Shakuhachi-playing-study-group(尺八吹奏研究会）. I have been studying the shakuhachi and published a text book [尺八吹奏法Ⅱ］. I wish to share with pleasure of playing the shakuhachi with all of the ESS members.