Xymax Real Estate Institute

RESEARCH REPORTEnergy Consumption and Energy Cost in Office Buildings(September 2015)
The price per unit is down, the cost is down, and the consumption is flat.

December 9, 2015

Xymax Real Estate Institute has been studying the energy consumption and energy cost of office buildings in
the Greater Tokyo area on a continuous basis. The report covering the results for the period from January 2010
to June 2015 was released in September. The latest report covering the results for the period ending September
2015 is available now.

Findings from Research for Period Ending September 2015 (Figure 1)■ Energy Consumption
The level in 2011 continued. Remained nearly flat.
■ Energy Price per Unit
Started to fall in March 2015. Four points down from previous study (June 2015)■ Energy Cost
Decreased following the price drop. Three points down from previous study (June 2015)
Figure 1:

12-month Average Energy Consumption / Price / Cost

•The figures for each month are not based on the actual amount of a particular single month. They are the average of thepast 12 months.
• Indexed based on December 2010 = 100• Energy consumption is converted to mega joule (MJ) (amount of primary energy)• Consumption and cost are calculated based on per sqm and indexed.
• Cost = Price per Unit × Consumption

Energy Consumption and Energy Cost in Office Buildings (September 2015)
All rights reserved. All the contents are as of the date of this report. Xymax Corporation does not guarantee the accuracy or completeness of the information herein.
Copying, quoting, forwarding, distributing, reprinting or any other use of this report is not allowed without prior permission from Xymax Corporation.
Copyright © 2015 Xymax Corporation. All rights reserved.

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RESEARCH REPORT｜Xymax Real Estate InstituteMonthly Energy Consumption, Price per Unit and Cost
Figure 2: Energy Consumption (MJ/sqm/month)Figure 3: Energy Price per Unit (yen/MJ)

Figure 4: Energy Cost (yen/sqm/month)Figure 2 shows energy consumption. The summer of 2015 was 50.5 MJ/sqm/month lower than the summer of2010 before the 3.11 earthquake. The level has not changed from 2011, remaining nearly flat.
Figure 3 shows energy price per unit. The price had a year-over-year decrease of 0.28 yen/MJ or 11%,influenced by the decreased fuel adjustment charges of electricity and gas since April 2015.
Figure 4 shows energy cost. As a result of changes in consumption and price, the summer of 2015 had ayear-over-year decrease of 35.9 yen/sqm/month or 9.7%, below the level seen in 2010 before the 3.11
earthquake.
Energy Consumption and Energy Cost in Office Buildings (September 2015)
All rights reserved. All the contents are as of the date of this report. Xymax Corporation does not guarantee the accuracy or completeness of the information herein.
Copying, quoting, forwarding, distributing, reprinting or any other use of this report is not allowed without prior permission from Xymax Corporation.
Copyright © 2015 Xymax Corporation. All rights reserved.

2RESEARCH REPORT｜Xymax Real Estate InstituteResearch Overview
PeriodApril 2009 – September 2015 (78 months)

SubjectData

Of typical tenant-occupied office buildings in Greater Tokyo managed by Xymax Group, we obtained
valid data from approx. 100 buildings.
Monthly data are estimated as follows:
1) Gather the amount of consumption of and cost paid for (excl. tax) the electricity, gas, heat and oilin each building.
2) Convert the amount of consumption in 1 to mega joule (MJ) (amount of primary energy) basedon the following coefficient and add all the results.
Electricity: 9.76 MJ/kWh | City Gas: 45 MJ/m3 | Cool/hot water, steam: 1.36 MJ/MJ

How toCalculate

Open Steam: 2.68 MJ/kg | Bunker A: 39.1 MJ/L3)

4)•Notes

•

A: Energy Consumption (MJ/sqm/month) Divide the total consumption calculated in 2 by the gross floor area (excluding vacant space).
B: Energy Price per Unit (Japanese yen/MJ)
 Divide the total cost calculated in 1 by the total consumption calculated in 2.
C: Energy Cost (Japanese yen/sqm/month) Divide the total cost calculated in 1 by the gross floor area (excluding vacant space)
Calculate the average of all the valid data for preceding A, B and C.
"Month" in this study is based on the date of the meter reading, which differs by building and by
the energy supplier.
To represent the continuity and accuracy of the data, the gross floor area excluding the vacant
space is applied in this study.

For the previous report, please refer to Energy Consumption and Energy Cost in Office Building (June 2015) released on
September 2, 2015.

https://www.xymax.co.jp/english/research/images/pdf/20150902-02.pdf

For questions on this report, please contact us.
Xymax Real Estate Institute
PHONE: +81 3 3596 1477 FAX: +81 3 3596 1478 info-rei@xymax.co.jp

Energy Consumption and Energy Cost in Office Buildings (September 2015)
All rights reserved. All the contents are as of the date of this report. Xymax Corporation does not guarantee the accuracy or completeness of the information herein.
Copying, quoting, forwarding, distributing, reprinting or any other use of this report is not allowed without prior permission from Xymax Corporation.
Copyright © 2015 Xymax Corporation. All rights reserved.

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