Can people with criminal records in Japan still go to Japan?

Yes, but there is a time limit. Unless there are serious problems, you can generally apply for a visa again after 5 years after returning to China. A friend of mine was sentenced to 1 year of probation in Japan and 3 years of probation. Thirteen years after returning to China, he successfully obtained a Japanese visa and traveled to Japan for a week. I'm back, no problem at all, hope it helps.