| Mar 31,
2013 | 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 | Mar 31,
2024 |
|---|
| Profit (loss) before income taxes | 468 | 705 | -431 | -3,246 | 377 | 1,111 | -993 | -314 | 462 | 514 | 848 | 609 |
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| Depreciation | 137 | 236 | 224 | 178 | 108 | 144 | 268 | 358 | 504 | 383 | 400 | 372 |
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| Impairment losses | 2 | 21 | 23 | 2,723 | 47 | 4 | 355 | 181 | 68 | 223 | 16 | 4 |
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| Amortization of long-term prepaid expenses | 3 | 4 | 5 | 3 | 3 | 3 | 6 | 16 | 18 | 21 | 18 | 16 |
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| Increase (decrease) in allowance for doubtful accounts | 0 | -0 | 0 | -0 | -0 | 38 | 50 | -29 | 23 | 23 | 17 | 8 |
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| Increase (decrease) in provision for bonuses | 10 | -70 | -90 | 40 | 23 | -6 | 44 | 35 | 38 | -76 | 71 | -170 |
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| Increase (decrease) in provision for point card certificates | -96 | 18 | 2 | -78 | -14 | 87 | -362 | 92 | -46 | -73 | 9 | 8 |
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| Increase (decrease) in provision for shareholder benefit program | - | - | - | - | - | 77 | 104 | 115 | -33 | -62 | 10 | -3 |
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| Interest income | - | -0 | -0 | -0 | -0 | -1 | -5 | -0 | -6 | -12 | -108 | -138 |
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| Interest expenses | 6 | 0 | 0 | 3 | 1 | 1 | 3 | 0 | 7 | 2 | 1 | 25 |
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| Subsidy income | - | - | - | - | - | - | - | - | -50 | -17 | -10 | -1 |
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| Insurance claim income | - | - | - | - | - | - | - | - | - | - | -1 | -4 |
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| Loss on disaster | - | - | - | - | - | - | - | - | - | - | 21 | 3 |
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| Compensation income | - | - | - | - | - | - | - | - | - | - | -26 | - |
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| Loss (gain) on sale of property, plant and equipment | - | - | - | - | -411 | - | - | 0 | -0 | - | 0 | - |
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| Loss on retirement of non-current assets | 2 | 3 | 3 | 3 | 5 | 4 | 7 | 6 | 37 | 5 | 4 | 1 |
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| Loss on cancellation of rental contracts | 0 | 1 | 0 | 0 | 3 | 0 | 1 | 1 | 5 | 1 | 0 | 5 |
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| Decrease (increase) in trade receivables | -246 | -223 | -146 | 174 | -49 | -2,403 | -1,894 | 1,198 | 1,772 | -795 | -1,816 | -1,112 |
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| Decrease (increase) in inventories | -137 | -133 | -168 | 239 | -199 | -277 | -975 | 408 | 511 | 196 | 148 | -603 |
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| Decrease (increase) in retirement benefit asset | - | - | - | - | - | -121 | -27 | -128 | 156 | 24 | 9 | -46 |
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| Decrease (increase) in prepaid expenses | 44 | -1 | 6 | 1 | -8 | -17 | -13 | 11 | 12 | 14 | 0 | -13 |
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| Decrease (increase) in consumption taxes refund receivable | - | - | - | - | - | -26 | -251 | 126 | 146 | 18 | -9 | -40 |
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| Increase (decrease) in trade payables | 411 | 418 | -31 | -558 | 94 | -148 | -218 | -562 | 201 | -143 | 244 | 404 |
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| Increase (decrease) in accounts payable - other | 117 | -74 | -26 | -38 | 48 | 206 | -43 | -25 | -42 | 133 | -97 | 181 |
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| Increase (decrease) in accrued expenses | -173 | 30 | 96 | -65 | 14 | 99 | 207 | -119 | -51 | -103 | 4 | -46 |
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| Increase (decrease) in advances received | -85 | 104 | -148 | 48 | -50 | -16 | -1 | 75 | -12 | 62 | -38 | -3 |
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| Increase (decrease) in accrued consumption taxes | 61 | 29 | 149 | -180 | 105 | -95 | 235 | 233 | -295 | -63 | 7 | -84 |
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| Other, net | -16 | 12 | -7 | 89 | 77 | 73 | 2 | 200 | 12 | 100 | 33 | 27 |
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| Subtotal | 694 | 1,285 | -411 | -715 | 315 | -1,467 | -2,607 | 2,860 | 3,324 | 360 | -246 | -601 |
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| Interest received | - | 1 | 0 | 0 | 0 | - | - | 0 | 6 | 12 | 108 | 136 |
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| Interest paid | -4 | -1 | -0 | -3 | -1 | -1 | -3 | -0 | -7 | -1 | -1 | -1 |
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| Income taxes paid | -421 | -270 | -440 | -100 | -111 | -75 | -412 | -314 | -426 | -288 | -163 | -389 |
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| Proceeds from compensation | - | - | - | - | - | - | - | - | - | - | 26 | - |
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| Proceeds from insurance income | - | - | - | - | - | - | - | - | - | - | 1 | 4 |
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| Subsidies received | - | - | - | - | - | - | - | - | 48 | 19 | 10 | 1 |
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| Net cash provided by (used in) operating activities | 269 | 1,015 | -851 | -818 | 203 | -1,532 | -3,001 | 2,546 | 2,944 | 102 | -265 | -849 |
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| Loan advances to subsidiaries and associates | - | - | - | - | - | -220 | -590 | - | -500 | -3,000 | -11,000 | -6,200 |
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| Collection of loans receivable from subsidiaries and associates | - | - | - | - | - | - | - | - | - | 3,500 | 8,000 | 5,200 |
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| Loan advances | - | - | - | - | - | - | - | - | - | -3,850 | -3,000 | -1,000 |
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| Proceeds from collection of loans receivable | - | - | - | - | - | - | 220 | - | - | 2,500 | 4,350 | - |
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| Purchase of property, plant and equipment | -50 | -117 | -63 | -64 | -95 | -134 | -572 | -1,433 | -457 | -276 | -469 | -264 |
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| Proceeds from sale of property, plant and equipment | - | - | - | - | 3,201 | - | - | 39 | 70 | - | 0 | - |
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| Payments for asset retirement obligations | - | - | - | - | -19 | -17 | -33 | -31 | -31 | -29 | -50 | -56 |
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| Purchase of intangible assets | -14 | -32 | -29 | -42 | -18 | -52 | -150 | -342 | -76 | -124 | -69 | -35 |
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| Payments of guarantee deposits | -23 | -51 | -18 | -11 | -61 | -66 | -67 | -42 | -59 | -41 | -39 | -117 |
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| Proceeds from refund of guarantee deposits | 10 | 21 | 47 | 47 | 40 | 48 | 53 | 42 | 65 | 43 | 54 | 69 |
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| Other, net | -4 | -2 | -7 | -4 | -4 | 3 | -12 | -44 | -13 | -15 | -7 | -11 |
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| Net cash provided by (used in) investing activities | -72 | -265 | -246 | 53 | 1,296 | -703 | -1,200 | -1,810 | -1,002 | -1,292 | -2,229 | -2,414 |
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| Proceeds from long-term borrowings | - | - | - | - | - | - | - | - | - | - | - | 3,500 |
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| Repayments of finance lease liabilities | -11 | -25 | -19 | -12 | -12 | -44 | -65 | -57 | -59 | -55 | -26 | -18 |
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| Purchase of treasury shares | -0 | -0 | -0 | -0 | -0 | -0 | -0 | -0 | - | -0 | -0 | -0 |
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| Dividends paid | -121 | -242 | -243 | -61 | -0 | -0 | -101 | -101 | -101 | -101 | -101 | -101 |
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| Payments for shareholder benefit program | - | - | - | - | - | -84 | -159 | -80 | -62 | -75 | -112 | -110 |
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| Net cash provided by (used in) financing activities | -1,158 | -355 | -261 | -73 | 2,678 | 6,019 | -730 | -248 | 424 | -783 | -239 | 3,271 |
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| Net increase (decrease) in cash and cash equivalents | -961 | 395 | -1,358 | -840 | 4,173 | 3,784 | -4,931 | 487 | 2,367 | -1,973 | -2,733 | 8 |
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