Japan has a very special culture that keeps crime low. It would get watered down with immigration. I don't see how those are not widely accepted facts, and I do

Japan has a very special culture that keeps crime low. It would get watered down with immigration. I don't see how those are not widely accepted facts, and I don't see how the conclusion can be anything else than that higher immigration would lead to more crime in Japan. Now, personally, I don't really like Japanese culture, and more crime is a price I'm willing to pay to not live in such a hierarchical, conservative and authoritarian(?) society. But let's not pretend that a culture like Japan's have no benefits or that it could withstand massive immigration without changing.