More updates on NewS's concert at Fukuoka from Koyama's J-web entry. All credit given to the awesome shine8 ^^. 

During Fukuoka con, Koyama & Shige went to the shower rooms together (why the hell do those 2 always go take shower at the same place?? lol).
Koya: "...shige, don't you think the water's too cold?"
Shige:"...yea..it's freezing"
Some minutes later they decided that there was something wrong with the showers, thus Koyama decided to get a hotel staff to help. With only a bath towel around his waist, Koyama successfully found a staff member, who decided there was no hot water and it can't be fixed in a short amount of time...Koyama suddenly remembers Shige's existence, went back to the shower rooms to find naked Shige shivering in the cold...they then gave up the idea of showering and went back to their rooms. A minute later, Ryo was spotted coming out of the shower rooms...
Koya: "Ryo-chan! Wasn't the water freezing?"
Ryo: "Not really."
K&S: "... ... ..."

Moral of the story?  Despite his skinny skinny self, Ryo does possess a body of steel that can deflect the cold....either that Koyama and Shige are wimps XD...j/k. ..* duck evil glare from K and S fans*