The sleevless Japanese national team wear has something new they call "Moist magic". They've made some sort of new pattern on the shirt which appears when it comes in contact with moisture. The Indonesia and and Malaysia wear do not have this though.
The feel of the Indonesian and Malaysian wear are similar to the 2012 and 2013 Japanese team wear while the new Japanese shirts are much more smoother and have a slightly more premium feel to them. I find it interesting that Yonex is not making the shirts the same way.
May I know what is the damage to you per shirt? Where can I purchase them?
I got them at a Japanese online retailer called Sunfast. The Sleeveless are sold-out already though. I'm not completely sure but I think the Japanese team wear is only available for purchase in Japan. You can try and search on rakuten for them though and see if anyone is shipping internationally. If not, I'm pretty sure at least the Malaysian and Indonesian shirts will be available through Sunrise or something.
They were almost 6000 yen a piece which would be like 60 USD.