屋上緑化・壁面緑化

Urban Farm DB summary

This National Institute for Environmental Studies explainer on rooftop and wall greening (revised May 2016) cites a 1985 Chubu Electric Power experiment finding 20-30% energy savings compared to traditional sunshades (yoshizu). It reports about 413.8 hectares of rooftop greening and 68.0 hectares of wall greening installed nationwide over the 15 years from FY2000 to FY2014, with FY2014 alone contributing about 26.9 hectares of rooftop and 5.0 hectares of wall greening, though FY2009 saw about a 20% year-on-year contraction. It also notes implementation challenges such as structural load assessment, root-barrier installation, and ongoing irrigation management.

Only numbers and their conditions are stored, as structured data — never the source's own sentences. Metric and condition names stay in English, as coded.

• 20–30 %↑ Increase

  energy saving vs sunshade(green roof)

  ClimateControl: traditional sunshade (よしず)

  source

  Chubu Electric Power experiment

  year

  1985

• 413.8 ha

  cumulative area(rooftop greening)

  Design

  region

  Japan

  period

  2000-2014年度

• 68 ha

  cumulative area(wall greening)

  Design

  region

  Japan

  period

  2000-2014年度

• 26.9 ha

  annual area(rooftop greening)

  Design

  region

  Japan

  year

  2014年度

• 5 ha

  annual area(wall greening)

  Design

  region

  Japan

  year

  2014年度

• -20 %↓ Decrease

  annual area change(rooftop greening)

  DesignControl: previous fiscal year

  region

  Japan

  year

  2009年度

Direction of conclusions

Each author conclusion is recorded only as a coded direction per topic. Read the original for the conclusion itself.

• Heat islandSupports
• Economic viabilityMixedWith caveats