Urasawa began writing a sequel to "Master Keaton" in 2012 titled "Master Keaton Remaster". When asked why he went back to a series after so many years, Urasawa stated it was because with the original series he had a hard time making the story he wanted due to contractual obligation, and because people affected by the 2011 Tōhoku earthquake and tsunami said they had enjoyed the series, so he wanted to do something for them. Beginning in the March 2012 issue of "Big Comic Original" it finished in 2014 and was collected into a single volume. As a guest at the 2012 Japan Expo in France, Urasawa talked about how he entered the manga industry, gave a live drawing demonstration, and performed two songs as a musician, and joined rock band Hemenway on stage the following day.