Zen and World War 2: http://en.wikipedia.org/wiki/Zen_at_War
Warrior Monks burning down other sects' temples: http://en.wikipedia.org/wiki/S%C5%8Dhei
Persecution and martyrdom of Christians: http://en.wikipedia.org/wiki/Martyrs_of_Japan
As to where these religious tendencies go in modern Japan, there are a number of things to think about (consider their celebrities are literally called "idols").
Confucius might not have said much about the Sky, but he constantly emphasized the importance of the Rites.
Also, once you blur out the technical theological details, is Confucius not effectively treated as a prophet? (This is a genuine question.)
In the Far East religions, you have most pieces of the jigsaw present: mysticism, the Sacred, priests, monks, prayers, meditation, afterlife, etc. But I think the central piece of a unique almighty exclusive God is missing, and then the result is completely different.
There is also this theory that the Far East did not have a powerful scientific revolution because of this missing piece: Without a God who created everything, there is less incentive to believe in a unique ordering of things (the Law of physics) and to try to discover it.
And no, Confucius is not a prophet, he made no miracles, he did not announce anything. He was just a failed political advisor who became the teacher of a few disciples. However, he proposed a very rational and revolutionary way of life, under the disguise of restoring the ancient Way. He also happen to be (along with Jesus and maybe Mohammad) the man who influenced the most the lives of most other humans.
The Japanese did some horrific things in the name of their Emperor, so I don't buy your assertion.
You could argue that the Far East are simply religiously backwards, using polytheism instead of monotheism, so your argument actually makes no sense, they simply haven't caught the monotheistic religious bug (yet).
He's also has a wonderful playful style of writing, well worth a read.
“Tallis indulges in refutation by caricature,” says Dennett, a professor of philosophy and co-director of the Center for Cognitive Studies at Tufts University. “He’s not taking his opponents seriously. He’s sneering instead of arguing. He’s ignoring the complexities of the arguments. So he’s not really doing philosophy. He’s doing propaganda.”
I'm pretty sure personally that it's built into our biology. In the words of Charlie Brooker:
"Imagine! Nothing to kill or die for! And no religion too! It's amazing, literally no one's ever had that thought before.
Okay, so there's always the possibility that the same part of the brain that handles fuzzy spiritual feelings is the same part that handles love and sorrow and pity and joy; the same part that makes us create songs and jokes and books and art and brightly coloured computer games in which an animated weasel collects starfish in a fountain; so once we wipe it out we might all be left scampering around the planet like thick, bipedal, cultureless mice - rutting, foraging, scratching behind our ears and doing very little else. But look on the bright side. No more religious conflict AND no more novelty ringtones. Two almighty evils erased for the price of one. Bargain."