Tokyo’s consumer price index (CPI) excluding fresh food rose 1.3% year-on-year in May 2026, marking the sixth consecutive month of cooling and the slowest pace in four years, data released today showed [1, 2, 3]. The broader CPI measure that excludes both fresh food and energy, a key gauge for the Bank of Japan’s underlying inflation, increased 1.6% in May [1, 2, 3]. Overall, Tokyo’s CPI climbed 1.4% year-on-year in May 2026 [1, 3].
The slower inflation pace was partly driven by a smaller rise in processed food prices compared to last year and a steep drop in water service fees, which restrained the CPI [1, 3]. Falling energy prices also contributed, reflecting petrol subsidies introduced by Prime Minister Sanae Takaichi. The prime minister plans to submit an extra budget to parliament soon to maintain these support measures [1, 3]. Government programs such as subsidies on utilities and nursery fees have helped ease the cost of living, while also skewing official inflation readings [3].
Tokyo’s inflation trends are seen as a leading indicator for nationwide price movements [1, 3]. Despite the current easing, Bank of Japan policymakers remain cautious of upward inflation risks related to the ongoing war in Iran. Yoshiki Shinke, senior executive economist at Daiichi Life Research Institute, said, "There is no strong momentum in inflation but upside risks are looming large due to the Iran conflict" [3].
Financial market traders currently assign a 77% to 80% probability of a Bank of Japan interest rate hike at the central bank’s next policy meeting, scheduled for June 15-16, 2026 [1, 3]. The upcoming meeting is expected to be a key moment for monetary policy amid mixed inflation signals.
The May CPI data was published today by Japan’s Ministry of Internal Affairs and Communications, confirming the slower inflation pressures ahead of the BOJ’s decision next month [1, 2, 3].
