I have a few families that visit me around my home and some at work. There’s a distinct family that’s easy to recognize because one of them has a wounded wing but still manages to fly. They just recently had a fledgling that left the nest because it’s flying around with them squawking for food all the time these days.
The larger size of their bills is very distinct compared to American crows. And sure enough they’re called large-billed crows. The videos I’ve found show they have much deeper voices than American crows. It looks like the carrion crows of Japan are more like American crows.