The regular edition of the previous 20th volume sold 917,057 copies in its first six days.
The volume’s 1,000 yen limited edition with a novel book also ranked 8th selling 89,277 units.
According to the newest Oricon sales report for the week ended December 11, the 463-yen regular edition of the 21st volume of Hajime Isayama’s mega hit manga series Shingeki no Kyojin/Attack on Titan sold 632, 419 copies in its first week, in its first three days, becoming the top-selling manga tankobon of the week.