Harambee Stars striker Michael Olunga moved to the top of the Japanese top-tier.
The former Gor Mahia player scored a goal to guide Kashiwa Reysol beat Urawa Diamonds 4-0 in a league match at the Saitama Stadium.
Brazilian forward Richardson opened the scoring for Kashiwa Reysol in the 32nd minute and the visitors carried the lead to the half time break.
Olunga doubled the lead on 51 minutes. This is his third goal in two games, and fifth of the season as he becomes the current leading scorer in the league.
Japanese Internationals Hayato Nakama and Yuta Kamiya completed the rout with a goal each later on.
Olunga was the second-leading scorer in the Japanese second-tier last season having scored 26 goals to aid Kashiwa Reysol back to the J1 League.