OSAKA — Koji Murofushi is the reigning Olympic champion in the men's hammer throw. When he picked up a gold medal in Athens on a hot summer day in 2004, suddenly an entire nation gained interest in the obscure sport.

News photo
Koji Murofushi competes in the final of the hammer throw on Monday night at Osaka's Nagai Stadium. AP PHOTO

The Japanese's interest in him remains at a high level. They cheered him on to add a gold at the 2007 IAAF World Athletics Championships on Monday night at Nagai Stadium, adding the top prize to his silver from the 2001 World Championships and bronze from worlds in 2003.