Square Enix staff who moderate/frequent this forum do actually send feedback to the development team in Japan. However, they probably take it with a grain of salt, because I doubt the opinions expressed in this forum are representative of the population as a whole.
Besides, if something needs fixing in the North American/EU servers, it probably needs fixing in the Japan servers, too.
Yoshi P is probably not reading all this stuff himself. But in case he is... Hello, Yoshi P. I hope you have a nice day. Please get some rest.