Japan's wholesale inflation accelerated in October as renewed yen falls pushed up import costs for some goods, data showed on Wednesday, complicating the central bank's decision on how soon to raise interest rates.

Japan's five-year government bond yield soared to a 15-year high, driven by a weakening yen and speculation of a potential interest rate hike by the Bank of Japan. The yen's decline to a five-month low against the US dollar,

The corporate goods price index (CGPI), which measures the price that companies charge each other for goods and services, rose 3.4% in October from a year earlier, Bank of Japan data showed, above market forecasts for a 3.0% gain. It followed a 3.1% increase in September.