I’ve never noticed this kind of robber fly before, probably because it resembles a bumblebee. It has wonderful eyes that follow your every move. A pretty efficient predator I’d say.

Laphria mitsukuriiLaphria mitsukuriiLaphria mitsukurii

Diptera: Asilidae
Laphria mitsukurii
Robber fly = oo-ishi-abu

Location: fureiai-no-mori Forest Park in Munakata (map here)