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Peak Demand (daily peak)

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As of the end of FY2018

FY Winter Summer Electricity Demand per Day
Peak Demand(*2)
(GW)
Date Changes from Previous Year
(GW)
Peak Demand(*2)
(GW)
Date Changes from Previous Year
(GW)
Peak Demand per Day
(GWh)
Date Changes from Previous Year
(GWh)
1951 1.665 Mar. 31, 1952 (Mon) 1.567 May 16, 1951 (Wed) 31.0 May 8, 1951 (Tue)
1955 2.572 Dec. 21, 1955 (Wed) 0.348 2.284 Sep. 28, 1955 (Wed) 0.276 43.7 Dec. 21, 1955 (Wed) 4.8
1956 2.840 Dec. 11, 1956 (Tue) 0.268 2.486 Sep. 26, 1956 (Wed) 0.202 46.9 Feb. 7, 1957 (Thu) 3.2
1957 3.204 Dec. 20, 1957 (Fri) 0.364 2.711 Sep. 16, 1957 (Mon) 0.225 52.9 Dec. 5, 1957 (Thu) 6.0
1958 3.537 Jan. 13, 1959 (Tue) 0.333 2.990 Sep. 25, 1958 (Thu) 0.279 60.9 Dec. 26, 1958 (Fri) 8.0
1959 4.207 Jan. 19, 1960 (Tue) 0.670 3.589 Sep. 25, 1959 (Fri) 0.599 71.7 Mar. 26, 1960 (Sat) 10.8
1960 4.764 Jan. 13, 1961 (Fri) 0.557 4.043 Sep. 20, 1960 (Tue) 0.454 82.0 Dec. 22, 1960 (Thu) 10.3
1961 5.547 Jan. 23, 1962 (Tue) 0.783 4.690 Jun. 28, 1961 (Wed) 0.647 96.3 Mar. 30, 1962 (Fri) 14.3
1962 6.111 Jan. 24, 1963 (Thu) 0.564 5.290 Aug. 22, 1962 (Wed) 0.600 108.0 Mar. 12, 1963 (Tue) 11.7
1963 7.157 Jan. 24, 1964 (Fri) 1.046 6.198 Aug. 23, 1963 (Fri) 0.908 124.5 Jan. 31, 1964 (Fri) 16.5
1964 8.059 Dec. 17, 1964 (Thu) 0.902 7.190 Aug. 26, 1964 (Wed) 0.992 141.3 Dec. 17, 1964 (Thu) 16.8
1965 8.422 Jan. 21, 1966 (Fri) 0.363 7.989 Aug. 25, 1965 (Wed) 0.799 151.4 Jan. 25, 1966 (Tue) 10.1
1966 9.575 Dec. 13, 1966 (Tue) 1.153 9.069 Aug. 24, 1966 (Wed) 1.080 172.0 Feb. 9, 1967 (Thu) 20.6
1967 10.874 Dec. 14, 1967 (Thu) 1.299 10.477 Aug. 25, 1967 (Fri) 1.408 193.9 Dec. 19, 1967 (Tue) 21.9
1968 11.913 Jan. 29, 1969 (Wed) 1.039 11.805 Aug. 9, 1968 (Fri) 1.328 218.7 Feb. 21, 1969 (Fri) 24.8
1969 13.424 Mar. 4, 1970 (Wed) 1.511 13.569 Aug. 8, 1969 (Fri) 1.764 250.9 Feb. 26, 1970 (Thu) 32.2
1970 14.791 Dec. 25, 1970 (Fri) 1.367 15.690 Sep. 3, 1970 (Thu) 2.121 283.7 Sep. 3, 1970 (Thu) 32.8
1971 16.032 Feb. 10, 1972 (Thu) 1.241 17.165 Aug. 11, 1971 (Wed) 1.475 303.7 Aug. 11, 1971 (Wed) 20.0
1972 17.598 Dec. 19, 1972 (Tue) 1.566 19.083 Sep. 8, 1972 (Fri) 1.918 334.7 Sep. 7, 1972 (Wed) 31.0
1973 18.169 Nov. 6, 1973 (Tue) 0.571 21.958 Aug. 9, 1973 (Thu) 2.875 386.1 Aug. 10, 1973 (Fri) 51.4
1974 18.894 Dec. 10, 1974 (Tue) 0.725 21.177 Aug. 29, 1974 (Thu) -0.781 361.8 Aug. 29, 1974 (Thu) -24.3
1975 20.175 Dec. 9, 1975 (Tue) 1.281 23.041 Aug. 21, 1975 (Thu) 1.864 391.3 Jul. 31, 1975 (Thu) 29.5
1976 21.307 Feb. 10, 1977 (Thu) 1.132 25.562 Aug. 24, 1976 (Tue) 2.521 433.0 Aug. 24, 1976 (Tue) 41.7
1977 22.006 Jan. 26, 1978 (Thu) 0.699 26.119 Aug. 5, 1977 (Fri) 0.557 453.7 Aug. 5, 1977 (Fri) 20.7
1978 24.136 Dec. 19, 1978 (Tue) 2.130 28.566 Jul. 25, 1978 (Tue) 2.447 498.1 Jul. 25, 1978 (Tue) 44.4
1979 24.423 Feb. 19, 1980 (Tue) 0.287 28.850 Jul. 24, 1979 (Tue) 0.284 505.8 Jul. 24, 1979 (Tue) 7.7
1980 25.298 Dec. 23, 1980 (Tue) 0.875 28.313 Jul. 22, 1980 (Tue) -0.537 499.8 Jul. 23, 1980 (Wed) -6.0
1981 25.920 Jan. 18, 1982 (Mon) 0.622 30.868 Jul. 17, 1981 (Fri) 2.555 541.6 Jul. 17, 1981 (Fri) 41.8
1982 27.341 Jan. 18, 1983 (Tue) 1.421 30.783 Aug. 24, 1982 (Tue) -0.085 537.3 Aug. 24, 1982 (Tue) -4.3
1983 28.862 Feb. 17, 1984 (Fri) 1.521 33.633 Aug. 19, 1983 (Fri) 2.850 591.1 Sep. 6, 1983 (Tue) 53.8
1984 30.137 Jan. 24, 1985 (Thu) 1.275 35.700 Sep. 3, 1984 (Mon) 2.067 627.5 Aug. 7, 1984 (Tue) 36.4
1985 31.861 Feb. 18, 1986 (Tue) 1.724 36.780 Aug. 29, 1985 (Thu) 1.080 643.7 Aug. 29, 1985 (Thu) 16.2
1986 32.946 Jan. 12, 1987 (Mon) 1.085 37.650 Sep. 4, 1986 (Thu) 0.870 659.4 Sep. 4, 1986 (Thu) 15.7
1987 34.906 Dec. 7, 1987 (Mon) 1.960 40.120 Aug. 21, 1987 (Fri) 2.470 717.0 Jul. 24, 1987 (Fri) 57.6
1988 38.010 Jan. 23, 1989 (Mon) 3.104 42.020 Aug. 23, 1988 (Tue) 1.900 756.8 Aug. 22, 1988 (Mon) 39.8
1989 40.350 Jan. 23, 1990 (Tue) 2.340 43.700 Aug. 22, 1989 (Tue) 1.680 781.9 Sep. 12, 1989 (Tue) 25.1
1990 42.200 Jan. 21, 1991 (Mon) 1.850 49.300 Aug. 23, 1990 (Thu) 5.600 902.2 Aug. 24, 1990 (Fri) 120.3
1991 43.500 Mar. 18, 1992 (Wed) 1.300 51.900 Jul. 24, 1991 (Wed) 2.600 919.8 Jul. 24, 1991 (Wed) 17.6
1992 45.200 Jan. 25, 1993 (Mon) 1.700 54.100 Sep. 4, 1992 (Fri) 2.200 960.9 Sep. 3, 1992 (Thu) 41.1
1993 46.150 Feb. 1, 1994 (Tue) 0.950 50.200 Aug. 24, 1993 (Tue) -3.900 885.3 Aug. 25, 1993 (Wed) -75.6
1994 45.869 Dec. 20, 1994 (Tue) -0.281 57.600 Aug. 4, 1994 (Thu) 7.400 1,043.8 Aug. 4, 1994 (Thu) 158.5
1995 47.950 Feb. 2, 1996 (Fri) 2.081 58.650 Aug. 25, 1995 (Fri) 1.050 1,045.9 Aug. 25, 1995 (Fri) 2.1
1996 48.550 Feb. 3, 1997 (Mon) 0.600 59.400 Jul. 18, 1996 (Thu) 0.750 1,077.5 Jul. 18, 1996 (Thu) 31.6
1997 52.300 Jan. 12, 1998 (Mon) 3.750 57.956 Jul. 4, 1997 (Fri) -1.444 1,053.7 Jul. 8, 1997 (Tue) -23.8
1998 49.192 Dec. 3, 1998 (Thu) -3.108 59.200 Jul. 3, 1998 (Fri) 1.244 1,070.5 Jul. 3, 1998 (Fri) 16.8
1999 50.050 Jan. 12, 2000 (Wed) 0.858 59.250 Sep. 1, 1999 (Wed) 0.050 1,069.1 Sep. 14, 1999 (Tue) -1.4
2000 51.295 Jan. 15, 2001 (Mon) 1.245 59.240 Aug. 3, 2000 (Thu) -0.010 1,091.8 Aug. 3, 2000 (Thu) 22.7
2001 50.380 Dec. 21, 2001 (Fri) -0.915 64.300
(*1)
Jul. 24, 2001 (Tue) 5.060 1184.3
(*1)
Jul. 24, 2001 (Tue) 92.5
2002 52.200 Dec. 9, 2002 (Mon) 1.820 63.200 Aug. 1, 2002 (Thu) -1.100 1,167.6 Aug. 1, 2002 (Thu) -16.7
2003 49.676 Jan. 19, 2004 (Mon) -2.524 57.360 Sep. 11, 2003 (Thu) -5.840 1,073.7 Sep. 12, 2003 (Fri) -93.9
2004 51.858 Mar. 4, 2005 (Fri) 2.182 61.499 Jul. 20, 2004 (Tue) 4.139 1,155.5 Jul. 21, 2004 (Wed) 81.8
2005 52.360 Feb. 6, 2006 (Mon) 0.502 60.118 Aug. 5, 2005 (Fri) -1.381 1,134.6 Aug. 5, 2005 (Fri) -20.9
2006 50.275 Jan. 17, 2007 (Wed) -2.085 58.058 Jul. 14, 2006 (Fri) -2.060 1,099.6 Jul. 14, 2006 (Fri) -35.0
2007 55.022
(*1)
Jan. 23, 2008 (Wed) 4.747 61.471 Aug. 22, 2007 (Wed) 3.413 1,164.2 Aug. 22, 2007 (Wed) 64.6
2008 50.291 Jan. 9, 2009 (Fri) -4.731 60.891 Aug. 8, 2008 (Fri) -0.580 1,157.6 Aug. 8, 2008 (Fri) -6.6
2009 52.401 Jan. 12, 2010 (Tue) 2.110 54.496 Jul. 30, 2009 (Thu) -6.395 1,051.9 Feb. 17, 2010 (Wed) -105.7
2010 51.504 Feb. 14, 2011 (Mon) -0.897 59.988 Jul. 23, 2010 (Fri) 5.492 1,141.8 Jul. 23, 2010 (Fri) 89.9
2011 49.657 Jan. 20, 2012 (Fri) -1.847 49.216 Aug. 18, 2011 (Thu) -10.772 1,013.4 Jan. 20, 2012 (Fri) -128.4
2012 47.432 Feb. 19, 2013 (Tue) -2.225 50.783 Aug. 30, 2012 (Thu) 1.567 986.1 Aug. 30, 2012 (Thu) -27.3
2013 49.425 Feb. 14, 2014 (Fri) 1.993 50.928 Aug. 9, 2013 (Fri) 0.145 1026.8 Feb. 14, 2014 (Fri) 40.7
2014 46.669 Feb. 5, 2015 (Thu) -2.756 49.799 Aug. 5, 2014 (Tue) -1.129 971.1 Aug. 5, 2014 (Tue) -55.7
2015 44.497 Jan. 18, 2016 (Mon) -2.172 49.574 Aug. 7, 2015 (Fri) -0.225 962.2 Aug. 6, 2015 (Thu) -8.9
2016 49.569 Feb. 9, 2017 (Thu) - 53.319 Aug. 9, 2016 (Tue) - 1,003.7 Jan. 20, 2017 (Fri) -
2017 52.659 Feb. 2, 2018 (Fri) 3.090 53.825 Aug. 9, 2017 (Wed) 0.506 1,063.4 Feb. 2, 2018 (Fri) 59.7
2018 49.179 Jan. 10, 2019 (Thu) -3.480 56.532 Jul. 23, 2018 (Mon) 2.707 1,076.5 Aug. 2, 2018 (Thu) 13.1

(Note)

  1. The highest value at a table is highlighted in FY2015 and prior.
  2. Total amount of electricity demand within TEPCO’s service area (on the area transmission end). Totals for prior to FY2015 are for the TEPCO generation end.

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