The Comic Market (Comiket) 95 event in Tokyo drew about 210,000 attendees on the third day on Monday, tying the all-time one-day attendance record.
The event broke the attendance record for the winter event, which Comiket 87 in 2014 previously held at 560,000 attendees.
Comiket 84 in 2013 holds the summer event and overall event record of 590,000 attendees.
The event drew about 170,000 attendees on its first day on Saturday and 190,000 attendees on Sunday, bringing the total to 570,000 attendees across all three days.