Environmental Performance

Energy consumption

Item 2019 2020 2021
Total energy consumption (thousand kWh) 428,961 396,465※1 426,911※2
 Fuel consumption (thousand kWh) 76,865 71,367 65,615
 Electricity consumption (thousand kWh) 296,704 275,079 283,858
 Other heat consumption (thousand kWh) 55,361 49,988 77,384
 Renewable energy self-consumption
 (thousand kWh)
31 31 54
Energy consumption intensity (kWh/㎡) 188.2 173.2 146.1
Non-fossil fuel certificate utilization
(thousand kWh)
- - 4,920

Greenhouse gas emissions

Item 2019 2020 2021
Total CO2 emissions (t-CO2) 158,711 142,583※1 150,079※2
 Scope 1 emissions (t-CO2) 13,858 12,902 11,756
 Scope 2 emissions (t-CO2) 144,852 129,680 138,323
Non-fossil fuel certificate utilization (t-CO2) - - 2,179
Total CO2 emissions (t-CO2)
*Non-fossil fuel certificate utilization deducted
158,711 142,583 147,900
CO2 emissions intensity (kg-CO2/㎡)
*Non-fossil fuel certificate utilization deducted
69.6 62.3 61.8

Water consumption

Item 2019 2020 2021
Total water consumption (thousand ㎥):A+B 1,752 1,363※1 1,360※2
 Purchased water consumption (thousand ㎥):A 1,571 1,209 1,219
 Other water consumption (thousand ㎥):B 181 154 141
Water consumption intensity (㎥/㎡):Subject to A 0.69 0.53 0.51

Waste emissions

Item 2019 2020 2021
Total waste emissions (t) 10,146 8,015 9,462
 General waste emissions (t) 7,709 6,076 7,816
 Industrial waste emissions (t) 2,438 1,939※1 1,646※2
Ratio by method of waste disposal
 Landfilling (%) 6.2 8.0 3.9
 Incineration (%) 28.9 29.6 30.2
 Recycling (%) 64.9 62.5 62.6

Notes on the Above Performance

1. Scope of data calculation

  • All properties owned by Nippon Building Fund Inc. (NBF) are covered. However, properties with exclusive ownership areas holding 25% or less than 25% are not covered.
  • NBF Shinagawa Tower partly owned by NBF is a part of the property including Shinagawa Grand Central Tower, but that is excluded from the calculation.
  • Parale Mitsui Building consists of a business administration building partly owned by NBF, a residential building, a retail building and a parking lot building, but the data is compiled for the entire building.
  • The above data consists of total consumption/emissions from common-use areas and tenants’ exclusive areas in each property and is not converted into equity.
  • Regarding gas consumption, some data that are difficult to collect due to direct contracts by tenants to gas providers are excluded for the calculation.

2. Calculation period

Calculation period: January 1st through December 31st each year

3. Calculation method

  • Energy consumption
    Energy consumption=Σ (consumption by energy type × heating value conversion factor × conversion rate for electricity)
    Calculated by using the conversion factor based on the “Act on Rationalizing Energy Use”
    Energy type: Electricity, cool water, warm water, city gas, bunker A, diesel oil
  • Greenhouse gas emissions
    Scope of greenhouse gas: Energy origin CO2
    Energy origin CO2 emissions=Σ (energy consumption × CO2 emission factor)
    The CO2 emission factors for fuel and other heat are based on the "Greenhouse Gas Emission Calculation and Reporting Manual” published by Ministry of the Environment and Ministry of Economy, Trade and Industry.
    The CO2 emission factor for electricity is based on the basic emission factor until 2020, given by each electricity provider published by Ministry of the Environment and Ministry of Economy, Trade and Industry. Since 2021, it is based on the adjusted emission factor given by each electricity provider published by the same ministry.
    - Include the energy origin CO2 emissions from tenants except for direct contracts by tenants to energy providers.
    • Non-fossil fuel certificate
      NBF has been sourcing its real CO2-free electricity together with a non-fossil fuel certificate since July 2021.
      Regarding the calculation of Scope 2 emissions in the previous page, the amount of non-fossil fuel certificate we purchased is not deducted.
  • Water consumption
    Total water consumption=Σ (Purchased water consumption*1 + Other water consumption*2
    *1 Purchased water consists of purchased clean water and industrial water among other things.
    *2 Other water consists of water recycled inside the property, grand water, rainwater among other things.
  • Waste emissions
    Total waste emissions=Σ(General waste emissions + Industrial waste emissions)
    Based on the “Waste Management and Public Cleansing Act”
  • Intensity figures
    Each intensity figure = Total consumption of each / Floor space
    Floor space is the space confirmed when constructing.
    The data was calculated from properties held by NBF at the end of each year. However, some portion of these properties like residential areas were excluded due to difficulties in collecting the data.
    Intensity figures are corrected by annual average occupancy rate.
    Corrected intensity figures = Non-Corrected Intensity Figures / Average vacancy rate [%]
    Calculations of energy consumption intensity and CO2 emission intensity are based on the energy consumption and CO2 emissions that reflect the non-fossil fuel certificate utilization.

※Some variance come from rounding off.

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