Popular enka singer Itsuki Hiroshi held an extravagant 55th birthday party at the Yokohama Arena on Friday. Actually it was a concert for 12,000 fans, many of whom may well have turned up to see the impressive line up of star guests. These included Morning Musume, Da Pump, veteran actors such as Watari Tetsuya and Matsukata Hiroki, and former sports stars Konishiki and Ochiai Hiromichi.