Reference Data in Yamagata 11 indicators covering reference data for Yamagata. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 170.5 Degree days 2025 up 32.3% 540th Cooling and heating degree days - Cities and FUAs — Change in cooling 71.12 Degree days 2025 up 140.9% 250th Cooling and heating degree days - Cities and FUAs 2,896 Degree days 2025 up 11.9% 80th Cooling and heating degree days - Cities and FUAs — Change in heating -29 Degree days 2025 up 91.4% 156th Precipitation - Cities and FUAs — Extreme precipitation days 16.5 Days per year 2024 down 17.5% 254th Precipitation - Cities and FUAs — Change in extreme precipitation 3.18 Days per year 2024 down 52.4% 296th Dependency ratio - Cities and FUAs 51.4 Percentage of population aged 15-64 years 2020 up 33.5% 34th Wind threats - Cities and FUAs — Exposure to wind threats 49.11 Percentage of area 2023 down 0.9% 131st Coastal flooding - Cities and FUAs — Built-up area exposure to 0 Percentage of built-up area 2022 — 277th Internet speed - Cities and FUAs — Downloading speed 18.5 Percentage of national value 2025 up 265.2% 233rd Internet speed - Cities and FUAs — Uploading speed 9 Percentage of national value 2025 up 190.0% 519th