Malaysia, Japan and Hong Kong no stamps. What are you on about?? You're wrong.
Japan is about 4,000km away from Thailand. I don't think you understand the meaning of nearby. And last time I was there about a year ago they still stamped.
Hong Kong is a bit closer, but still 3 countries away from Thailand. I wouldn't call that nearby either.
I just entered Malaysia 5 days ago and got a stamp..... They stamp at all land borders and all airports except KL.