Came across this suit from GX3, the fundoshi. It is actually an underwear, in 3 colors choices.
But I can imagine to be wearing this thong for private sunning or beaches more acceptable to revealing swimsuits.
I love and want the Navy color. The strings, Japanese's style are very attractive.
http://tnt.ne.jp/SHOP/k531.html
I got to download a copy of this video. So sexy.
https://www.youtube.com/watch?v=QLj0wWLm5-4