That is absolutely correct, and depsite living in Japan for several years and many military and civilian training session on international protocol, I completely forgot that point.
When two captains of Japanese industry meet, no matter if they are fierce competitors or partners in a joint endevor, that is exactly how they greet each other. A slight bow while maintaining eye contact.
This is Protocol 101. Either Obama is so arrogant he ignores the advice from his protocol staff, or he is so arrogant he has no protocol staff.
Or maybe his protocol staff is incompetent - but I believe his arrogance has more to do with it. He will bow low to any that aren’t of European ancestry.