Photo/Illutration A store in Tokyo’s Nerima Ward on Nov. 15 sells cartons of milk at the higher price introduced two weeks earlier. (Asahi Shimbun file photo)

Tokyo’s consumer price index for January jumped a resounding 4.3 percent year-on-year, the largest surge since May 1981.

The internal affairs ministry announced Tokyo’s figures for the month on Jan. 27, with the CPI rising to 104.2, marking its 17th consecutive month of increase.

Higher costs for crude oil and natural resources pushed gas bills up by 39.7 percent, the largest increase in 41 years and 10 months.

Energy prices including gas and electricity bills were up 26 percent, the same increase seen the previous month.

Food prices rose 7.4 percent, although the index excludes perishables. That is just slightly less than the 7.5 percent increase seen a month ago.

Clothing and footwear prices were up 5.1 percent, the biggest increase in just over 30 years, as winter sales discounts dried up.

Observers view the CPI for Tokyo’s 23 wards as a weather vane for how the nationwide index will move.