| Mar 31, 2014 | Mar 31, 2015 | Mar 31, 2016 | Mar 31, 2017 | Mar 31, 2018 | Mar 31, 2019 | Mar 31, 2020 | Mar 31, 2021 | Mar 31, 2022 | Mar 31, 2023 |
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| Profit (loss) before income taxes | 879 | 1,439 | 1,866 | 1,424 | 1,317 | 1,424 | 1,626 | 1,969 | 1,733 | 1,907 |
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| Depreciation | 2,177 | 2,488 | 1,938 | 1,697 | 1,692 | 1,686 | 1,634 | 1,546 | 1,669 | 1,671 |
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| Amortization of long-term prepaid expenses | 42 | 48 | 50 | 53 | 51 | 120 | 213 | 68 | 157 | 143 |
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| Amortization of deferred assets | 1 | 0 | 0 | 0 | 1 | 2 | 2 | 2 | 2 | 1 |
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| Loss on retirement of property, plant and equipment | 16 | 16 | 86 | 37 | 36 | 84 | 86 | 32 | 71 | 36 |
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| Amortization of goodwill | 4 | 6 | 10 | 10 | 10 | 10 | 10 | 10 | 7 | 7 |
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| Amortization of negative goodwill | -2 | -2 | -2 | -2 | -2 | -2 | -2 | -2 | -2 | -2 |
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| Increase (decrease) in allowance for doubtful accounts | 9 | -6 | -4 | -1 | 1 | -0 | -0 | 3 | 1 | 7 |
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| Increase (decrease) in provision for bonuses | -7 | -15 | 133 | -1 | -30 | -27 | 35 | -3 | 14 | -75 |
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| Increase (decrease) in provision for retirement benefits for directors (and other officers) | 22 | 29 | 18 | 23 | 21 | 12 | 9 | 10 | 31 | 5 |
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| Increase (decrease) in provision for gas holder repairs | -23 | 16 | 16 | 13 | -34 | -12 | -20 | 14 | 14 | 19 |
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| Increase (decrease) in provision for LNG unloading arm repairs | 18 | 18 | 1 | 15 | 15 | -29 | -24 | 22 | 22 | -43 |
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| Increase (decrease) in provision for lpg tank repairs | 3 | 5 | 5 | 6 | 12 | 12 | 16 | 16 | -25 | -8 |
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| Increase (decrease) in Reserve for removal costs | - | - | - | - | - | - | - | - | 86 | -85 |
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| Increase (decrease) in provision for bonuses for directors (and other officers) | -2 | 1 | 4 | 1 | -2 | -3 | 2 | 0 | -2 | -5 |
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| Increase (decrease) in retirement benefit liability | -50 | -109 | -98 | -23 | 14 | -19 | -9 | 15 | 2 | 21 |
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| Interest and dividend income | -12 | -13 | -16 | -17 | -18 | -19 | -20 | -28 | -30 | -21 |
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| Interest expenses | 122 | 110 | 127 | 59 | 54 | 47 | 42 | 36 | 30 | 30 |
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| Share of loss (profit) of entities accounted for using equity method | 15 | 15 | 18 | 2 | -46 | -42 | -33 | -42 | -43 | -46 |
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| Other non-operating revenue | -64 | -45 | -51 | -50 | -53 | -78 | -105 | -93 | -151 | -118 |
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| Other non-operating expenses | 3 | 1 | 3 | 9 | 1 | 1 | 5 | 8 | 21 | 27 |
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| Decrease (increase) in trade receivables | -568 | 494 | 486 | 34 | -224 | -42 | 66 | 59 | -474 | -1,209 |
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| Decrease (increase) in inventories | -2 | -142 | 1,729 | 625 | 45 | -793 | 116 | 558 | -683 | -1,718 |
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| Decrease (increase) in other assets | -8 | -20 | -44 | -97 | -216 | -259 | -220 | -283 | -28 | 166 |
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| Increase (decrease) in trade payables | -132 | -1,189 | -185 | 174 | 127 | -31 | 418 | -156 | 70 | 270 |
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| Increase (decrease) in accrued consumption taxes | 59 | 223 | 41 | -371 | 174 | -79 | 188 | -229 | 322 | -302 |
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| Increase (decrease) in other liabilities | -106 | 149 | 94 | 314 | 160 | -161 | 68 | -70 | 33 | -140 |
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| Subtotal | 2,536 | 3,896 | 6,569 | 4,632 | 3,731 | 2,130 | 4,711 | 3,449 | 3,229 | 481 |
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| Interest and dividends received | 12 | 13 | 16 | 17 | 22 | 22 | 25 | 34 | 36 | 28 |
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| Interest paid | -123 | -112 | -129 | -60 | -189 | -48 | -42 | -37 | -30 | -30 |
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| Other non-operating revenue | 17 | 23 | 2 | 213 | 52 | 73 | 109 | 91 | 152 | 109 |
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| Other non-operating activity | -3 | -1 | -3 | -9 | -1 | -1 | -5 | -8 | -21 | -27 |
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| Income taxes paid | -386 | -552 | -928 | -744 | -707 | -511 | -558 | -547 | -546 | -667 |
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| Net cash provided by (used in) operating activities | 2,052 | 3,327 | 5,526 | 4,049 | 2,907 | 1,664 | 4,239 | 2,983 | 2,820 | -106 |
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| Purchase of property, plant and equipment | -1,944 | -1,512 | -1,218 | -3,449 | -1,382 | -1,160 | -3,062 | -2,136 | -2,346 | -2,163 |
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| Proceeds from sale of property, plant and equipment | 1 | 18 | 0 | 0 | 1 | - | 0 | - | 0 | - |
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| Purchase of investment securities | -13 | -9 | -1 | -370 | -5 | -19 | -6 | - | -6 | -1 |
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| Proceeds from contribution received for construction | 46 | 67 | 38 | 3 | 12 | 34 | 58 | 14 | 19 | 18 |
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| Purchase of intangible assets | -3 | -7 | -57 | -37 | -103 | -47 | -59 | -223 | -40 | -57 |
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| Purchase of other investment activities | -29 | 15 | -29 | -33 | -93 | -181 | 1 | -156 | -62 | -91 |
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| Net cash provided by (used in) investing activities | -1,937 | -1,343 | -1,298 | -3,842 | -1,575 | -1,374 | -3,069 | -2,500 | -2,435 | -2,294 |
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| Net increase (decrease) in short-term borrowings | -110 | 594 | 170 | -698 | -67 | 220 | -20 | -204 | -236 | 2,180 |
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| Proceeds from long-term borrowings | 4,118 | 2,132 | 600 | 2,592 | 1,012 | 1,540 | 1,200 | 2,540 | 1,800 | 2,000 |
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| Repayments of long-term borrowings | -4,206 | -4,168 | -4,489 | -2,458 | -1,818 | -2,146 | -2,167 | -2,379 | -2,142 | -1,651 |
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| Repayments of lease liabilities | -46 | -44 | -76 | -57 | -138 | -63 | -52 | -51 | -72 | -102 |
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| Dividends paid | -60 | -60 | -72 | -72 | -84 | -72 | -72 | -72 | -83 | -72 |
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| Expenditure for acquisition of shares without change of consolidation scope | - | - | - | - | - | - | - | - | -0 | - |
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| Net cash provided by (used in) financing activities | -304 | -1,546 | -3,875 | -700 | -1,095 | -521 | -1,110 | -166 | -734 | 2,355 |
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| Net increase (decrease) in cash and cash equivalents | -188 | 437 | 353 | -493 | 237 | -230 | 60 | 317 | -348 | -45 |
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