Shueisha's Young Jump recently made an announcement in its latest issue, that ONE and Yuusuke Murata's One-Punch Man manga has more than 12 million copies in print.
Murata's OPM manga is currently running on Shueisha's free Tonari no Young Jump spinoff website. The series is adapted from ONE's original web manga of the same name. Shueisha recently published the 3th compiled volume in Japan on 4th of April.The original manga seires is published digitally by Viz Media on its Weekly Shonen Jump anthology. Viz Media is also planning to release the series in print.