Takayuki Inubushi dropped out with an upper leg problem just after 15km .
Takayuki Inubushi is a former national record holder at 2 : 06 : 57 who was already in trouble by 10Km .
Takayuki Inubushi , a former national record holder at 2 : 06 : 57 who was already in trouble by 10Km , dropped out with an upper leg problem just after 15km .