Tokyo and Kyoto Release 2026 Zodiac-Year Population Estimates as Tokyo’s 20-Year-Olds Match Record Low

Overview

• Tokyo estimates 1.026 million Horse-year residents, the smallest cohort among the zodiac groups, with 501,000 men and 526,000 women.
• Tokyo’s 20-year-old population stands at 113,000, down 4,000 from last year and tying the lowest level on record set in 2014.
• Tokyo reports 18-year-olds at 106,000, a rise of 2,000 from the previous year according to the same register-based method.
• Across the Horse cohort, those born in 1978 (Showa 53) are the most numerous in both Tokyo and Kyoto, with Tokyo also noting 1990 (Heisei 2) as the next largest group.
• Kyoto estimates 191,400 Horse-year residents, including 90,600 men and 100,800 women, based on the Basic Resident Register as of January 1, 2026.