Madhouse and director Shingo Natsume’s first 12-episode anime season based on ONE and Yuusuke Murata’s One-Punch Man manga aired in Japan from October-December 2015.
Viz Media acquired the master license to the second anime season, including digital streaming, TV broadcast, electronic sell-through, home media, and merchandising rights for North America, Latin America and Oceania.
Viz Media released the first season on home video in North America.
Viz Media and Daisuki both streamed the series outside of Japan as it aired.