FX.co ★ Tokyo Inflation Accelerates as September CPI Jumps to 2.7% Year-on-Year

Tokyo’s consumer inflation picked up noticeably in September, with the Tokyo Consumer Price Index (CPI) rising 2.7% year-on-year, up from 1.9% in August 2026. The latest data, updated on 01 October 2026, underscore a clear acceleration in price growth in Japan’s capital.

The figures are based on a year-over-year comparison, where the “actual” September reading measures price changes relative to September a year earlier, while the “previous” August indicator reflected changes against August a year before. The move from 1.9% to 2.7% suggests that price pressures in Tokyo are gaining momentum, a development closely watched by markets as a potential signal for broader nationwide inflation trends and future policy considerations.