I was wondering where I would happen to go in order to look for an anime themed swimsuit of some kind. Or, if by chance someone knows anything about this certain item, could tell me if it could be used as actual swimwear. (I do know what it says on the site itself though but I just want to make sure)

http://www.jlist.com/product/TMT123

Yup this is a Shimabikini the bikini equivalent of the famous Shimapan Panties

Did you specifically want this one or were you looking for more generic.
As they also sell this:
http://www.jlist.com/product/TMT023


Finally though as a point - I ordered the Shimapan in blue some years back now in a M and a Jap M is about a size 8 so that might be something to bare in mind when you order. And from experience the size 5L are for men who want to crossdress. but then it does say in the title Mens so that was pretty obvious