Koichiro Fukushima has officiated 382 matches on record, averaging 1.0 cards and 13.6 fouls per game โ a lenient official. A player is dismissed roughly once every 19 games, and the spot is pointed to 0.08 times per match. Home teams win 41% of matches under him, drawing 25% and losing 34%. Most active in the J1 League (179 matches). 33% of his bookings come after the 75th minute, with the first card around the 47'. He cards more than 15% of J1 League 2025 referees.