Well Japan owns lots of good land on the US west coast and China is WAAAAAAAY bigger than Japan will ever be and already surpassed Japan in that regard.
The trend has already hit Sydney, Japan, Vancouver and now the US. In 2015 in the US, buyers from China, Hong Kong and Taiwan spent $28.6bn on homes in the 12 months through March, becoming the largest group of foreign homebuyers for the first time, according to an annual report by the National Association of Realtors.