Most would prefer not think about it, of course. Amongst those that do, the majority are opposed to nuclear weapons' possession and use.
In Japan it would be hard to find either a dove or a hawk or anything between who'd say bombing those two cities was justified. Hawks are more likely to say Japan was minding its own imperialistic business, just as Europeans had been doing for centuries prior. So Japan didn't deserve those bombings. Doves will be opposed to any kind of nuclear weapon and tend to showcase their compatriots' suffering to help prevent further proliferation and destruction.
Some Japanese Buddhists believe that their constant prayers for peace have been directly responsible for averting destruction of the world since 1945. I'd guess that's 15% of the population.
>I've only seen the contrarian opinion coming from westerners.
Not even Japanese believe otherwise. When John Hersey (discussed elsewhere) revisited Japan in the 1960s, the Japanese he met with were amazed by the notion that the US should apologize for the atomic bombs. They viewed it as an understandable thing to do in wartime.