Underground Installation Rate of Transmission Line
	TEPCO			In Tokyo's 23 wards			Total of 9 EPCOs
(At FY end)	Overhead Lines (km)	Underground lines      (km)	Underground Installation Rate (%)	Overhead lines (km)	Underground lines         (km)	Underground Installation rate (%)	Overhead lines     (km)	Underground lines        (km)	Underground installation rate             (%)
1965	15,379	2,830	15.5	2,301	2,195	48.8	69,042	5,090	6.9
1970	18,393	3,764	17.0	2,331	2,704	53.7	90,553	6,943	7.1
1975	20,636	4,833	19.0	785	3,296	80.8	104,410	8,032	7.1
1980	22,964	5,967	20.6	741	3,783	83.6	115,483	10,143	8.1
1985	24,841	6,548	20.9	695	4,018	85.3	125,154	11,513	8.4
1990	26,126	7,548	22.4	644	4,335	87.1	130,635	13,538	9.4
1994	27,518	8,411	23.4	623	4,725	88.4	136,036	15,426	10.2
1995	27,706	8,820	24.1	616	4,949	88.9	137,760	16,149	10.5
1996	27,943	8,935	24.2	599	4,934	89.2	139,940	16,576	10.6
1997	28,114	9,120	24.5	595	5,007	89.4	140,999	16,973	10.7
1998	28,242	9,246	24.7	595	5,046	89.5	142,236	17,317	10.9
1999	28,817	10,602	26.9	620	6,183	90.9	143,302	18,895	11.6
Source: TEPCO Illustrated 2000.
Notes:	Underground installation rate (%) = (Total length of underground cables/total length of overhead lines + total length of underground cables)*100
	With the amendment of the Electric Utility Accounting Regulation (effective from March 29, 2000), Distribution facilities over 20,000 voltage have been included in transmission facilities since fiscal year 1999.
Underground Installation Rate of Distribution Line
	TEPCO			In Tokyo's 23 wards			Total of 9 EPCOs
(At FY end)	Overhead Lines (km)	Underground lines      (km)	Underground Installation Rate (%)	Overhead lines (km)	Underground lines         (km)	Underground Installation rate (%)	Overhead lines     (km)	Underground lines        (km)	Underground installation rate             (%)
1965	128,253	3,941	3.0	14676	2952	16.7	592,862	5,793	1.0
1970	165,009	6,141	3.6	17208	3899	18.5	725,459	9,416	1.3
1975	198,734	7,934	3.8	18453	4701	20.3	832,127	14,358	1.7
1980	231,393	10,701	4.4	18561	6015	24.5	919,340	19,841	2.1
1985	253,444	13,237	5.0	18915	7160	27.5	987,182	25,208	2.5
1990	278,794	19,902	6.7	19025	10368	35.3	1,063,836	37,397	3.4
1994	295,778	24,885	7.8	19157	12645	39.8	1,123,829	48,185	4.1
1995	298,436	25,850	8.0	19170	13013	40.4	1,135,901	51,493	4.3
1996	302,033	26,723	8.1	19196	13269	40.9	1,146,741	52,871	4.4
1997	305,485	27,732	8.3	19202	13637	41.5	1,162,098	56,034	4.6
1998	308,563	28,600	8.5	19221	13943	42.0	1,174,220	57,151	4.6
1999	311,419	29,492	8.7	19226	14216	42.5	1,185,115	59,117	4.8
Source: TEPCO Illustrated 2000
Note:	In the case of TEPCO, the total length of underground cables in fiscal 1990 and thereafter includes that of transmission cables belonging to Distribution Dept.