Japanese Let’s Play?

I was wondering if there are any Let's Plays of Japanese games by Japanese people (Let's Play is where someone records themselves playing a video game and it includes their commentary and reactions and things like that). I was looking for some, but I have no idea what to call it in Japanese. I found simple walkthroughs with no kind of commentary, but that's it. Any help would be greatly appreciated!

"Game jikkyo/Haishin" [ゲーム実況/配信] on NicoNico douga[ニコニコ動画].
http://www.nicovideo.jp/
http://youtu.be/hu9V3HHiugs (how to sign up/free)

"Nico-dou(nick)" 2 types of video games movires.
"douga[動画]" means recording/encording file update by user
like "YouTube" insert/add comments anytime by viewers.
other one "Nama-housou[生放送]" means live broadcasting
like "Ustream" insert/add comments realtime by viewers.
Many videos copy to YouTube.
http://youtu.be/qPbsdXeKk5Y

if become a Nama-housou member need update
"Premium Account[プレミアム会員]" 525Y/a month.
Public member[一般会員] always free(0Y).

niconico player is very simple like this.
http://getstyles.org/images/styles_screenshot/32/117/58691/2abc064edfd...
no install software "browser" only (IE,opera,firefox,safari,Chrome...)
http://faq.nicovideo.jp/EokpControl?&tid=10434&event=FE0006
if iPhone or Android celler need official (or unofficial) apps.

also "http://www.niconico.com/" Beta version still exist
but not quite same original Japanese version as portal site.
http://en.wikipedia.org/wiki/Nico_Nico_Douga