J.League leaders Kashiwa Reysol slipped to a shock 5-0 thrashing at Cerezo Osaka on Saturday.
Cerezo had only won two games this season before Saturday but they were 2-0 up inside the first half-hour thanks to strikes from Taka Inui and Rodrigo Pimpao.
Luis Martinez extended the advantage in the 68th minute, before Ryuji Bando and Shu Kurata struck late on.
Vegalta Sendai could have moved to within a point of the summit but could not take full advantage of the leaders' slip-up as they were held to a 1-1 draw by Nagoya Grampus Eight.
Yong Gi Ryang put Vegalta ahead a minute before the break but Makoto Kakuda's own goal denied them all three points.
Gamba Osaka were held to a 1-1 draw at Urawa Red Diamonds.
Gamba, who would have gone level with Vegalta with a win, took the lead through Takashi Usami's 56th-minute strike, but were pegged back by Genki Haraguchi 21 minutes later.
At the bottom, basement boys Avispa Fukuoka beat Vantforet Kofu 1-0 but Yusuke Tanaka's goal was not enough to take them off the foot of the table.
They moved to within four points of second-bottom Montedio Yamagata, who were beaten 2-0 at Albirex Niigata thanks to Atomu Tanaka's double.
Cerezo had only won two games this season before Saturday but they were 2-0 up inside the first half-hour thanks to strikes from Taka Inui and Rodrigo Pimpao.
Luis Martinez extended the advantage in the 68th minute, before Ryuji Bando and Shu Kurata struck late on.
Vegalta Sendai could have moved to within a point of the summit but could not take full advantage of the leaders' slip-up as they were held to a 1-1 draw by Nagoya Grampus Eight.
Yong Gi Ryang put Vegalta ahead a minute before the break but Makoto Kakuda's own goal denied them all three points.
Gamba Osaka were held to a 1-1 draw at Urawa Red Diamonds.
Gamba, who would have gone level with Vegalta with a win, took the lead through Takashi Usami's 56th-minute strike, but were pegged back by Genki Haraguchi 21 minutes later.
At the bottom, basement boys Avispa Fukuoka beat Vantforet Kofu 1-0 but Yusuke Tanaka's goal was not enough to take them off the foot of the table.
They moved to within four points of second-bottom Montedio Yamagata, who were beaten 2-0 at Albirex Niigata thanks to Atomu Tanaka's double.