The series Shikkakumon no Saikyou Kenja

The total circulation of the series Shikkakumon no Saikyou Kenja: Sekai Saikyou no Kenja ga Sarani Tsuyoku Naru Tame ni Tensei Shimashita (Light Novel: 16 volumes <Still in publication> and Manga Adaptation: 21 volumes <Still in publication>) is 6.5 million copies printed in Japan.