(For more stories on the Japanese economy, click [ID:nECONJP])

* Rising yields reflect concerns over govt spending

* Japan's debt burden already worst among major economies

By Stanley White

TOKYO, Nov 11 (Reuters) - Japan's senior vice minister for the economy Motohisa Furukawa said on Wednesday the government was carefully watching long-term interest rate moves and must be careful to not let rising rates become a trend.

Furukawa also said the government would do its best to maintain the bond market's trust in the government's fiscal discipline.

Yields on 10-, 20- and 30-year Japanese government bonds spiked to multimonth highs earlier this week on worries the Democratic Party-led government will not be able to rein in spending and will sell a record amount of debt to fund its policies. [JP/]

"We have to be careful to not let rising yields become a trend," Furukawa told reporters at a briefing.

"I am watching the situation closely."