Hi aaming2002, if you can understand English, I am just wondering where did you buy your sakurakikaku.net DVDs from?
I tried to find them online but all of the online stores only accept delivery or payment within Japan only. There is only one site but it is so expensive at US$80.00 per DVD. The site is
http://www.xxxdvd.co.jp/home.htm
If you could reply, that'll be fantastic. Thanks!