The dollar fell against the yen today after Japan's central bank chief said the government will raise interest rates when signs of a consumer-driven economic recovery appear. Tokyo stocks closed lower. The dollar bought 107.86 yen today, down 1.30 yen from its level of 109.16 yen late Thursday in Tokyo and also below its late New York level of 108.70 yen overnight. The greenback ranged between 107.62 yen and 108.83 yen during the day.