Japanese do not claim to be Israelites. It's other people who have theorized that some Japanese traditions might have an Israelite origin and so, there might have been some contact in ancient times, not necessarily meaning that they descend from Israel. But I think that, if there is some similarity it could be explained by just coincidance, or perhaps by some misterious conection between human souls. Last week i was reading about Japan, and I was amazed to discover that some ideas I had when I was a child were already used in Japan. Am I a Japanese then? Lol