Very cool stuff :)
For those who can't read Japanese, like myself, let google translate by using the link below:
http://translate.googleusercontent.com/translate_c?hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=ja&tl=en&twu=1&u=http://ev.nissan.co.jp/LEAF/OPTION/dop.html"...