I saw on your Instagram where you posted a piece of Double+ from a 2014 sketchbook. Has that character/world been in your head for quite some time? How has your technique/discipline changed over the years?

The main character came from a sketch I did in the fall of 2013. I kept drawing him in different robot suits and vehicles, and the story just built up around that. The art style and stories have gone in a direction I wasn't anticipating, but it's happened organically and I'm happy with the results.

Volcano Trash isn't quite a year old and you already have something planned for this spring/summer. Are you trying to release something every year?

I actually finished Volcano Trash back in July of 2016. I wrapped up The Ideal Copy back in August of 2017, and I'm working on the 2019 book right now. My Koyama books come out about a year after I've finished them, so by the time a book is out I'm already halfway done with the next one. For the foreseeable future, I'd like to have a longer book out every year. I try to put out at least two minicomics every year, regardless of what else comes out.