Japan and Senegal remain well on their way to reach the knockout stage of the World Cup heading in to either face Belgium or England.
Sadio Mane put Senegal ahead from close range after an awful mistake by Eiji Kawashima, the ball flying past the Japan keeper after his attempted punched clearance hit the Liverpool Midfielder.
Japan were level before half-time through Takashi Inui's lovely curling finish, before Yuya Osako hit the crossbar.
Nineteen-year-old defender Moussa Wague thought he had sealed Senegal's second straight Group H win with a fine finish from an angle but substitute Keisuke Honda salvaged a point for Japan moments after coming on.