Reference Data in Hitachi 11 indicators covering reference data for Hitachi. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 321.5 Degree days 2025 up 61.3% 374th Cooling and heating degree days - Cities and FUAs — Change in cooling 146.48 Degree days 2025 up 504.2% 110th Cooling and heating degree days - Cities and FUAs 1,243 Degree days 2025 down 13.3% 802nd Cooling and heating degree days - Cities and FUAs — Change in heating -393.48 Degree days 2025 down 93.5% 816th Precipitation - Cities and FUAs — Extreme precipitation days 26.5 Days per year 2024 up 16.5% 96th Precipitation - Cities and FUAs — Change in extreme precipitation 7.03 Days per year 2024 up 114.4% 93rd Dependency ratio - Cities and FUAs 57.9 Percentage of population aged 15-64 years 2020 up 40.5% 15th Wind threats - Cities and FUAs — Exposure to wind threats 15.8 Percentage of area 2023 down 84.2% 182nd Coastal flooding - Cities and FUAs — Built-up area exposure to 0.0403 Percentage of built-up area 2022 down 45.0% 211th Internet speed - Cities and FUAs — Downloading speed -3.3 Percentage of national value 2025 down 222.2% 987th Internet speed - Cities and FUAs — Uploading speed 10.1 Percentage of national value 2025 up 34.7% 489th