yamada_kikaku make manga-traing channel.for person who want to be manga_ka.
http://manga-training.com/
http://www.youtube.com/user/yamadakikaku2009/

To my pleasure," Yamada-kikaku" will show an example ad manga or manga works so on in this you tube.

There are How to manga tutorial in manga-training.com.

http://www.yamada-kikaku.com/lesson.html

http://www.manga-training.com/how-to-draw-manga.html