Yep, they are NOT altruistic. They come to learn. Bow and smile, and then watch out. But heck, they are nice people, HIGH C!!
Not really a knock on the Japanese.. in my time, I have dealt with some U.S. companies that toured our facilities. Pretty soon, would come an "unsolicited" proposal.. They were super-nice people too.. even offered some key people a nice job after they retired..LOL!!