Why the author of the wildly popular Assassination Classroom, Yusei Matsui designed his protagonist Koro Sensei as an octopus?

One of the tasks required during pre-production of an anime, is the design of various mechanical devices that may be shown featured in the anime. This job is called "mechanical design" and is done ...

Like many, I've got an overflowing list of new anime I'm looking forward to, and I didn't think there would be any room for more series to go alongside the likes of Demon Slayer and Dan Da Dan.