Statistics from all 380 J1 League matches in the 2021 season: 920 goals in total, an average of 2.42 per match, with the first goal arriving after 33.8 minutes on average.
111 matches (29.3%) saw two or more goals before the break; 268 (70.7%) had one or none.
Simulation: a £100 starting bankroll with flat stakes on every match (£380 staked in total across the season).