Further interest rate hikes will be necessary to complete Japan’s monetary policy normalization, Bank of Japan board member Kazuyuki Masu said in a speech on Friday. Masu noted that raising rates would help reduce the policy divergence between Japan and other major economies, a gap widely seen as a key driver of prolonged yen weakness that has pushed up import costs for businesses and households. Masu stressed that policy tightening must be handled carefully. He said timely and appropriate rate hikes are needed to keep underlying inflation below 2%, while warning against raising rates too aggressively in a way that could disrupt the gradual upward trend in wages and inflation. The speech was Masu’s first public appearance since joining the BoJ’s nine-member board last July, when he characterized his stance as balanced between hawkish and dovish views.