Domo is a nocturnal creature
If you’re wondering about Domo’s sleeping habits, then worry no more. In one of NHK’s Domo shorts, it is shown that Domo has a habit of falling asleep during the day, sometimes while doing things that one should do while awake, such as eating (the video shows Domo falling through the table while holding a bowl of rice.) But why? Domo seems like the kind of creature who is full of pep and energy, despite the fact that he seems to use said energy to do mischief from time to time.
There you go, turns out the little brown mascot spends his nights glued to the TV screen, leaving very little time for actual sleep. And of course, the body will not allow this, so he falls asleep in the daytime, whether he likes it or not. There’s a lesson in there somewhere for kids. There’s a reason why kids’ shows are usually not broadcast in the evening.