According to his Twitter, Yoshiki was hospitalized last night.
He sent the following updates to all of his fans.
twitpic.com/arn017 Just got out of emergency room.. I’m fine now! 救急病院から戻ってきた。。大丈夫だよ！— Yoshiki (@YoshikiOfficial) September 6, 2012
..was hospitalized last night for neurogenic acute abdominal pain, Dr said I’m too stressed out..Everybody please don’t work too hard..— Yoshiki (@YoshikiOfficial) September 6, 2012
Seems like everything is fine now, and he’s on the road to recovery.