No it's not. Their concept of right and wrong is completely different.
What they choose to ascribe it to is another thing all together but the social mores and intrinsic moral values of right and wrong are the same
What intrinsic moral values?
I note that from 1900 to 1945 Japan was one of the most vicious, cruel barbarous societies on earth. Ask China or anyone that survived the Bataan death march
Different society, different morals. Slavery was not considered immoral by many, if not most Christians for centuries. Then, all of a sudden epiphany! Polygamy was not considered immoral in biblical times, why is it now?
The same essential morals - fixed objective morals - are placed in every man's heart by God, whether they choose to acknowledge him or not
Is that fact? Because it's in the Bible? Fine, if you want to believe it, that's your prerogative, but just because you believe something doesn't make it universally true. If you are going to make statements of faith as statements of fact you better have some hard evidence to prove them.
Really? of the 10 Commandants, numbers 5-10 deal with how man should relate to man - which of these do the Japanese reject? None. They acknowledge all of these because they intrinsic to every man's heart.
"Different society, different morals"
And what is the difference post 1945? It's the introduction of western Christian culture.
"Slavery was not considered immoral by many, if not most Christians for centuries."
It was Christianity, based on Christian morals, which led the fight to abolish slavery in every western society. Polygamy has immoral since Adam and Eve and this was reiterated in the 10 Commandments and the teachings of Jesus. It was always immoral. That's why God finally wiped out Israel and the Jews spent 70 years in Bablylonian captivity - they refused to follow God's commands. The inability of individuals or even societies to live up to the fixed morals of the creator does not mean the absence of the same. Every polygamist in the Bible suffered for it.
If you are going to make statements of faith as statements of fact you better have some hard evidence to prove them.
I do have hard evidence. Although every epistemology must start with certain unprovable axioms, (even empiricism) even these can be corroborated by human experience itself. The evidence is there for anyone who truly wants to look at and for it.