Tokyo's core consumer price inflation was unchanged in October from the previous month, government data showed Friday, offering little encouragement for Japan's central bank as it struggles to reach its ambitious 2 percent inflation target.

The data comes ahead of the Bank of Japan's rate review next week, when it is set to keep monetary policy steady and maintain its optimistic view on the economy even as global trade frictions and volatile markets cloud the growth outlook.

The core CPI for Tokyo, a leading indicator of nationwide price trends, rose 1.0 percent in October from a year earlier, matching a median market forecast.