Japanese opposition doesn't want USD denominated US government bonds

This is an interesting piece of news published more than two weeks ago or so on the BBC web site and that I have just been told about:

Japan's opposition party says it would refuse to buy American government bonds denominated in US dollars, if elected.

The chief finance spokesman of the Democratic Party of Japan, Masaharu Nakagawa, told the BBC he was worried about the future value of the dollar.

Japan has been a major buyer of US government bonds, helping the US finance its Federal budget deficits.

But, he added, it would continue to buy bonds only if they were denominated in yen - the so-called samurai bonds.

It's odd enough for me not to have seen it mentioned anywhere else to take it with a grain of salt. If that info would be real and the Japenese really moved toward refusing USD denominated treasuries, it would start getting really troublesome for the US (though it would help them in the long run, forcing them to reduce spending and increase production and also prevent them from exporting so much inflation).