Masayoshi Son's $50 billion investment in America's tech industry is a big win for Donald Trump. The president-elect was quick to brag that the Bill Gates of Japan wouldn't be dropping that kind of cash if he hadn't triumphed on Nov. 8.

Maybe so, but I'm more intrigued by what Prime Minister Shinzo Abe is thinking right now. Why, he is surely wondering, is SoftBank billionaire Masayoshi Son acting so publicly to make America's economy great and not Japan's?

It's hard to recall the last time a Japanese CEO made these kinds of global headlines. The plot thickens when you consider the massive Abenomics cheerleading effort in Tokyo. Abe and his surrogates are overwhelming the airwaves with a "you watch, it's all coming together" message of structural reform and booming job growth.