Prime Minister Sanae Takaichi said government efforts to boost growth potential will underpin market trust in the yen, countering views that rising living costs from the weak currency hurt her approval ratings.
Prime Minister Sanae Takaichi told parliament on Monday that exchange rates move on various factors set by markets.
"Creating a strong economy by boosting its growth potential and strengthening Japan's competitiveness would lead to market trust in the yen," she said.
A Yomiuri newspaper poll conducted between July 24 and 26 showed her administration's approval rating fell to 57 percent from 69 percent in June, the lowest since she took office last year. The disapproval rate rose to 34 percent from 21 percent.
The Bank of Japan raised interest rates to a 31-year high of 1 percent in June. It is expected to keep rates steady on Friday.