Hakuto': It's named after 'Inaba no shirousagi' (the hare of Inaba), a legend in Inaba Province, which is the old name of the area located in eastern Tottori where this train has its destination.
「白兎」（はくと）・・・目的地である鳥取県東部の令制国（いわゆる旧国名）を指す因幡国（いなばのくに）の神話「因幡の白兎」から。