In real life, Yao and Kiku were separated by the sea so Yao didn't pay much attention to Kiku because he was too far off.I do know that an ancient gold seal granted to Wa Country was dug up in Kyushu. You can see it today in a museum there.At that point in time, Japan was not unified yet.

http://heritageofjapan.wordpress.com/yayoi-era-yields-up-rice/lifestyle-and-society-of-the-land-of-wa/continental-connections-and-international-relations/

Actually, I had the impression most second-gen Chinese raised in the West can't speak Chinese.I've only been to HK once and never to China (they left me behind each time).All my immediate family is here too so I only live here. People fresh from China seem very alien to me. OTL

I went to HK a long time back but I wonder if the proportion of mainlanders has increased now? My strongest impression of HK was its homogeneity, everyone in the streets was Chinese! First time in my life I was in a totally "Chinese" place...I also got the same impression in Japan (everyone was Japanese except for me that is), everyone had black hair, dark eyes etc. So unlike home which has a mixed population...

I think people growing up in their ancestral countries must have very different self-images from those growing up abroad as minorities or immigrants...

Edit: Forgot to say I heard in HK, certain Chinese festivals are public holidays...I think the festival atmosphere must be a lot more 浓厚 (;_;)