Looks like Mitsubishi is working on their new concept of ebike.
It does look like recumbent bike than bicycle though, which may contribute to the comfort factor.
Mitsubishi really need to step up their game since their current lineup of i-miev ebikes are bombarded by their rivals.
From the current lineup it's clear that their target customer is Japanese women. Ebike companies focused on US sales have hardly made a dent in this population of potential ebikers. Most ebikes I see that are for sale here are completely unappealing to me. I want a step-thru with cargo capacity in a light color, so these Japanese bikes look great to me.
As for brakes, Japanese folks are used to using a bike as everyday transportation, often instead of a car, and have always relied on caliper brakes. Bike racks are often super crowded, with bikes all jammed in. I can't imagine having disc brakes with large exposed discs on a bike in Japan that has to be put in Japanese crowded bike racks--the discs would get jammed and bumped and bent. So, I think they are going for a low-maintenance bike that can be put in racks at markets and train stations, and that can carry cargo and kids, which is what Japanese women are often carrying.
"Kaiteki," BTW, means "comfortable" or "pleasant". It's interesting that this system includes solar charging stations, and a rain cover. Also, it's a trike, so maybe they are thinking about the elderly?
Just to add to the brake comment. Ebikes in Japan are all limited to 24 kph, 14.9 mph. They strictly enforce that, I've read. That speed wouldn't be an issue for rim or roller brakes.