The key gauge of consumer prices in Tokyo posted a 1.2 percent year-on-year fall in September -- its 24th straight month of decline -- mainly due to falls in housing rents and personal computers, the government said Friday.

The consumer price index for the capital's 23 wards, the leading index of nationwide price moves, was 98.8 against the 2000 base of 100, the Public Management, Home Affairs, Posts and Telecommunications Ministry said.

The index, which excludes the volatile prices of perishable foods, fell by the same year-on-year percentage rate as it did in August.