Koei Koya has officiated 279 matches on record, averaging 1.6 cards and 14.7 fouls per game โ a lenient official. A player is dismissed roughly once every 8 games, and the spot is pointed to 0.10 times per match. Home teams win 41% of matches under him, drawing 25% and losing 34%. Most active in the J2-League (148 matches). 32% of his bookings come after the 75th minute, with the first card around the 40'.