Masashi Nakayama, who scored Japan\'s maiden goal in the FIFA World Cup™, is retiring after admitting he can no longerpush his body to the limit at the age of 45. \"When I wish to play at certain levels, my body won\'t respond to it,\" he told a news conference in Sapporo, home to his J.League club Consadole Sapporo, citing injuries to his both knees. \"With recurring pain, I cannot stand on the stage to fight.\" He is the J.League\'s all-time leading scorer with 157 goals, which were affectionately dubbed \'Gon-Goals\' after his nickname, \'Gon\'. The J.League 2012 ended last Saturday when Consadole were relegated after finishing at the bottom of the 18-team division. Nakayama started in all three of Japan\'s group matches in their first appearance in the world finals in 1998. The Samurai Blue failed to record a victory in France, but the forward netted their solitary goal, in a 2-1 loss to Jamaica. Nakayama broke his leg in a clash with a Jamaican player soon after his 74th-minute strike, but continued playing until full-time. Nakayama, who also played at Korea/Japan 2002, scored 21 goals in 53 international matches between 1990 and 2003. He holds the world record for the fastest hat-trick at international level. In 2000, he scored three goals in three minutes and three seconds in an AFC Asian Cup qualifier against Brunei. He also pulled four hat-tricks in four successive J.League games in 1998, another feat recognised by the Guinness Book of World Records. FIFA