A Bank of Japan Policy Board member Thursday called for the need to secure market trust in Japan's fiscal health to fully exert the effects of monetary easing, apparently urging the government to proceed with its planned sales tax hike next year.

"As our country's fiscal situation is severe, there is a possibility of long-term interest rates rising inconsistently with the economy and prices if credibility over finance is decreased," Policy Board member Yoshihisa Morimoto said in a speech in Morioka.

Touching on the government's goal of halving the ratio of the primary balance deficit to the nation's gross domestic product by fiscal 2015 from the fiscal 2010 level, Morimoto urged the government to continue its efforts to promote the establishment of a sustainable fiscal structure.