Nico Nico Douga or ニコニコ動画 is the Japanese competitor to Youtube and is chalk full of videos any otaku will love. You do need to register to see any videos n the site although that is not hard in the slightest, just follow this guide. The site also lets its user comment inside the video’s frame. This feature can be turned off although I have not done so, there is just something nice about seeing the text. One thing to note is that you will often see “ww…” this is the equivalent of “lol”. While the below video is hosted on Youtube I was originally posted on Nico Nico. Searching for “mad” on Nico Nico will net you many more videos like this.
Pixiv is another site any otaku should have bookmarked. It is a great place to find artwork. Many peices of which you will find later reposted on 4chan. Again like Nico Nico you need to have an account to view, this again is not hard to setup and is detailed in this post. There are some really striking good peices of artwork if you are willing to look. If you don’t want to bother with searching you can simply watch the Daily, Weeky and Monthy rankings page. Thats how I found the image below.
Ninja war?