The question was about if Japan has any reasons to feel threatened by what happened in Ukraine. My reason is, any democratic society should be, which is not hard to imagine.
The question of "who is more saint" does not have any strategical significance and is clear reflection of russian propaganda. Obviously, nobody is saint. That doesn't make what happened in Bucha less shocking.
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The list of "disrespecting international law" is pretty big. The list of punishment is way shorter and highly selective.
And what punishment are we talking about, voluntary economical sanctions? Those numbers of atrocities, stealing children, mass graves - I still can't understand how the international response is so mild.
This is an interesting little bit on the end of that question.
The problem with unlimited access to information is that you can find a thousand people arguing for a thousand different opposing things with all that information.
In my perspective, there is no doubt about japanese government stance on the matters in Ukraine. And any other non-totalitarian society. I am ready being convinced otherwise.
There are very long tensions between Japan and Russia about the Kuril Islands, that both countries have a claim on. It is very possible, that the same vague claims used on annexing Crimea today, or Donbas, would be used against Japan, and may not stop there. What is more, Japan is an ally of the United States since WW2, and seems to benefit much both militarily and economically. What is more, another raising power in Asia and growing tensions around Taiwan may have the same consequences for Asia, which may threaten japanese influence in the reqion. We are also seeing proliferation of nuclear weapons, and the threats and blackmail is rising, when deescalation is seen as a sign of weakness.
Usually, being united against common threat is the cheapest strategy, and to pay a few bucks less for oil might turn to be very expensive in the long run. If there would be no punishment for disrespecting international law, the chaos would come.