BECC 2016 Conference
JYUKANKYO RESEARCH
INSTITUTE INC.
Home Energy Report Pilot:
Large-scale look at consumer
behavior in Japan
21 Octorber 2016
Renaissance Baltimore Harborplace Hotel
Sho Hirayama
Jyukankyo Research Institute Inc.
Residential Energy Consumption in Japan
JYUKANKYO RESEARCH INSTITUTE INC.
95
Other
Less Than
Half
Water
Heating
Space
Heating
10% Down
45
40
Space
Cooling
US (2009)
Japan (2010) Japan (2014)
Final Energy Use per Household (GJ/year)
(Source) U.S. Energy Information Administration, Residential Energy Consumption Survey.
Japan: Jyukankyo Research Institute Inc., "Residential Energy Statistics Yearbook"
 Japanese household
use less than half of
energy compare to US
in 2010.
 After Fukushima
accident, that decreased
by 10% via voluntary
consumer behaviors.
 Is Home Energy
Report (HER) still
effective even in Japan?
© 2016 Jyukankyo Research Institute Inc.
1
Outline of the Study
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Intervention
Dec. 2015 – Jan. 2016
Usage Comparison
Telephone Survey
Dec. 2015–Feb. 2016
Feb. 2016
Random Assignment
(min-max t-statistic
randomization method)
Target
Population
Treatment
(20,600ss)
Treatment
Effect
kWh
Treatment
（1,000ss）
kWh
Mail HERs Based on
Electricity Usage Data
kWh
Treatment Control
Control
（20,600ss）
No Report
kWh
Impact Evaluation via Randomized Control Trial (RCT)
Control
(500ss)
① 41,200 households were randomly assigned to
treatment and control groups.
② HERs were mailed twice to the treatment group during winter.
③ Saving impact was analyzed
by comparing electricity usage across both groups.
④ EE awareness and behaviors were measured via a phone survey.
© 2016 Jyukankyo Research Institute Inc.
2
Neighbor Comparison in Japanese Version HER
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Mostly same as US,
smiley faces are
modified
© 2016 Jyukankyo Research Institute Inc.
3
Energy Efficiency Tips Used in Hokuriku Pilot
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6 tips are selected
for Hokuriku’s winter
A modern Japanese kotatsu
(Source) http://en.wikipedia.org/wiki/File:Kotatsu-tastefulTN.jpg
Close window shades
to prevent cold air
Use energy-efficient
light bulbs
Set the temperature of
heating appliances
relatively low
© 2016 Jyukankyo Research Institute Inc.
4
Estimated Program Savings Impact
JYUKANKYO RESEARCH INSTITUTE INC.
Monthly Savings Rate
(with 95% confidence interval)
2.0%
0.9% after
1 month
1.5%
1.2% after
2 months
1.2%
1.5%
1.2%
0.9%
1.0%
0.9%
0.5%
0.4%
0.6%
0.0%
0.0%
-0.5%
-0.3%
December-15
January-16
February-16
(1st HER mailed)
(After 1 month)
(After 2 months)
Note: Monthly Savings Rate (%) = Decrease rate of Treatment group’s electricity
usage compare to control group calculated via Panel Data Regression Analysis.
© 2016 Jyukankyo Research Institute Inc.
5
Comparison of EE impact in Hokuriku
with Other Opower’s programs
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3.5%
Monthly Savings Rate
3.0%
Hokuriku Consumers
Respond more Quickly
than others
we would expect 1.5~2%
range by the second year
2.5%
2.0%
1.5%
1.0%
0.5%
0.0%
-0.5%
Hokuriku
North America
Europe
Asia
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Program Age (months)
• Hokuriku consumers respond more quickly than other programs.
• If the program were to continue, we would expect steady savings in
at least the 1.5~2% range by the second year.
© 2016 Jyukankyo Research Institute Inc.
6
Energy Efficiency Behaviors’ Frequency
カーテ
ンを閉
めて冷
気遮断
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Close window shades Recipients (n=1000)
to prevent cold air
Controls (n=500)
58%
暖房器
具の設
定温度
を低め
に
39%
スイッチ
窓やド
付タップ
冷蔵庫 アまわ 省エネ で家電
の設定 りのす 型の照 のスイッ
温度調 き間を 明を使 チを切
節
用
る
ふさぐ
Set the temperature of heating Recipients (n=1000)
appliances relatively low
Controls (n=500)
Cover the gap under Recipients (n=1000)
windows / doors to prevent draft Controls (n=500)
Adjust the refrigerator Recipients (n=1000)
temperature
Controls (n=500)
0%
15%
38%
23%
31%
11%
29%
15%
28%
14%
20%
7%
22%
17%
10%
+4% *
18%
24%
19%
+9% **
22%
45%
Turn off electronics Recipients (n=1000)
with a tapped switch
Controls (n=500)
Use Recipients (n=1000)
energy-efficient light bulbs
Controls (n=500)
12%
10%
Always - 5
8%
Most of the time- 4
10%
20%
30%
40%
50%
60%
70%
80%
Note: ** P<0.05, * P< 0.1
• HERs Recipients have a high frequency of all EE Behaviors
compared to Controls.
© 2016 Jyukankyo Research Institute Inc.
7
Energy Efficiency Attitudes
省エネ効
ご家庭
果がある
の月々
のなら多 ご家庭で
自分の の電気
日ごろか 住まいを 料金が
少の出 省エネに
費や手 つながる もっと省 らご家庭 省エネに どの程
間をかけ 取り組み エネ上手 で省エネ すること 度か把
ても構わ をしてい になりた を意識し は大切 握してい
ない
る
る
だ
い
ている
JYUKANKYO RESEARCH INSTITUTE INC.
I know monthly electricity bill
for my home
Recipients (n=1000)
It’s important to be that
my home is energy efficient
Recipients (n=1000)
I am usually conscious about
saving energy at home
Recipients (n=1000)
I want to be better
at saving energy
Recipients (n=1000)
I am doing something
to save energy at home
Recipients (n=1000)
Controls (n=500)
17%
I would spend some money or
do something for energy saving
Recipients (n=1000)
19%
76%
Controls (n=500)
72%
15%
56%
Controls (n=500)
21%
48%
25%
31%
27%
36%
Controls (n=500)
21%
28%
24%
21%
12%
+5% *
24%
36%
Controls (n=500)
Controls (n=500)
12%
+6% **
19%
23%
14%
20%
Strongly Agree - 5
Agree- 4
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Note: ** P<0.05, * P< 0.1
• HERs Recipients strongly agreed to all EE Attitudes compared
to Controls.
• HERs improved the frequency of EE behaviors and Attitudes.
© 2016 Jyukankyo Research Institute Inc.
8
Conclusions & Recommendations
JYUKANKYO RESEARCH INSTITUTE INC.
• Conclusions
– HERs recipients (treatment group) lowered their usage
1.2% on average compared to control group.
– HERs improved the frequency of EE Behaviors & EE
attitudes.
• Future Issues
– Continued Measurement of Long-Term Impact of
Behavioral EE Programs.
– Evaluating Impact in other parts of Japan and other
seasons.
Thank you!
© 2016 Jyukankyo Research Institute Inc.
9
Acknowledgment
JYUKANKYO RESEARCH INSTITUTE INC.
• This study (“2015 Research Report on the Effects of EnergyUsage Information Provision on Residential Behavioral
Energy Efficiency”) was commissioned by the Japanese
Ministry of Economy, Trade & Industry (METI) and carried
out jointly by Jyukankyo Research Institute, Inc., Opower
Japan, and Hokuriku Electric Power Company.
• The full report (Japanese) can be found here:
http://www.meti.go.jp/meti_lib/report/2016fy/000233.pdf
© 2016 Jyukankyo Research Institute Inc.
10

年度前期追試験の時間割変更について