| Mar 31,
2013 | Mar 31,
2018 | Mar 31,
2019 | Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 | Mar 31,
2024 |
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| Profit (loss) before income taxes | -85 | 98 | -273 | -482 | -1,691 | -1,165 | -2,266 | -2,500 |
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| Depreciation | 1 | 5 | 20 | 2 | 49 | 36 | 64 | 131 |
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| Impairment losses | - | - | 39 | 86 | 274 | 447 | 44 | 153 |
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| Share-based payment expenses | - | - | - | - | 20 | 15 | 7 | - |
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| Gain on reversal of share acquisition rights | - | - | - | - | - | - | - | -0 |
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| Loss on retirement of non-current assets | - | - | - | - | 25 | - | 10 | 13 |
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| Loss (gain) on valuation of investment securities | - | - | - | 6 | - | - | 147 | 5 |
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| Loss (gain) on sale of shares of subsidiaries and associates | - | - | -46 | - | - | - | - | -4 |
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| Loss (gain) on sale of businesses | - | - | - | 6 | - | - | - | -159 |
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| Amortization of goodwill | - | - | 11 | 23 | 35 | 28 | 21 | 57 |
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| Amortization of trademark | - | - | - | - | - | - | 31 | 46 |
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| Increase (decrease) in allowance for doubtful accounts | - | - | 107 | 81 | 164 | 65 | 488 | 468 |
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| Increase (decrease) in provision for bonuses for directors (and other officers) | - | - | - | - | - | - | - | 13 |
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| Subsidy income etc-OpeCF | - | - | - | - | -137 | -80 | -32 | - |
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| Increase (decrease) in allowance for investment loss | - | - | - | - | 105 | - | 50 | - |
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| Interest and dividend income | -0 | -0 | -0 | -0 | -0 | -0 | -3 | -1 |
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| Profit / Loss on sale / revaluation of available-for-sale securities | - | - | - | - | - | - | -20 | -16 |
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| Interest expenses | - | 10 | 26 | 17 | 36 | 13 | 120 | 246 |
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| Decrease (increase) in trade receivables | - | - | 11 | 15 | -12 | 11 | -41 | -278 |
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| Decrease (increase) in trade receivables | 8 | -1 | -4 | 1 | -11 | 7 | -24 | 1 |
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| Increase (decrease) in trade payables | - | - | 13 | -10 | -2 | 5 | 34 | 1 |
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| Decrease (increase) in inventories | - | - | - | - | - | - | -221 | 106 |
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| Decrease (increase) in real estate for sale | - | -689 | 274 | 168 | 1,252 | -126 | -178 | 63 |
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| Decrease (increase) in advance payments to suppliers | - | -143 | -39 | 100 | 58 | -7 | -162 | 121 |
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| Decrease (increase) in prepaid expenses | - | - | - | - | - | -10 | -91 | 67 |
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| Increase (decrease) in accounts payable - other | 1 | 10 | -13 | 9 | 9 | 10 | 100 | -53 |
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| Increase (decrease) in accrued consumption taxes | -3 | -8 | 5 | -11 | 66 | -78 | 20 | 18 |
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| Decrease (increase) in consumption taxes refund receivable | - | -53 | 52 | -25 | -12 | -9 | -16 | 100 |
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| Increase (decrease) in contract liabilities | - | - | - | - | - | - | 207 | 653 |
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| Decrease (increase) in operating loans receivable | -0 | 80 | -37 | -372 | 103 | -284 | -1,621 | -486 |
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| Decrease (increase) in operational investment securities | 50 | -98 | 12 | -369 | 209 | 2 | 25 | 16 |
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| Share of loss (profit) of entities accounted for using equity method | - | 11 | 46 | -1 | 1 | -1 | 91 | -3 |
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| Loss (gain) on change in equity | - | - | - | - | - | - | -19 | -9 |
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| Other, net | -3 | -3 | -23 | 7 | -7 | 11 | 17 | 6 |
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| Subtotal | -32 | -780 | 196 | -77 | -55 | -1,033 | -3,220 | -1,225 |
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| Interest and dividends received | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 |
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| Interest paid | - | -10 | -26 | -17 | -22 | -29 | -109 | -242 |
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| Income taxes paid | -0 | - | -29 | -0 | -3 | -4 | -2 | -6 |
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| Proceeds from subsidy income etc | - | - | - | - | 121 | 100 | 13 | - |
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| Net cash provided by (used in) operating activities | -30 | -789 | 141 | -93 | 42 | -965 | -3,315 | -1,472 |
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| Payments for acquisition of businesses | - | - | - | - | - | - | -770 | - |
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| Purchase of property, plant and equipment | - | -877 | -4 | -2 | -129 | -162 | -31 | -65 |
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| Proceeds from sale of property, plant and equipment | - | - | - | - | - | 0 | - | 87 |
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| Purchase of intangible assets | - | - | -2 | - | -30 | -61 | -36 | -53 |
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| Acquisition of goodwill | - | - | - | - | - | -4 | -17 | - |
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| Purchase of shares of subsidiaries and associates | - | -11 | -10 | - | - | - | -3 | - |
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| Purchase of investment securities | - | -0 | -0 | - | -34 | -6 | -130 | -292 |
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| Purchase of securities | - | - | - | - | - | - | -228 | -222 |
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| Proceeds from sale of securities | - | - | - | - | - | - | 257 | 262 |
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| Purchase of insurance funds | - | - | - | - | - | - | - | -3 |
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| Proceeds from cancellation of insurance funds | - | - | - | - | - | - | - | 34 |
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| Purchase of shares of subsidiaries resulting in change in scope of consolidation | - | - | -126 | -207 | - | - | - | -326 |
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| Proceeds from purchase of shares of subsidiaries resulting in change in scope of consolidation | - | - | - | - | - | - | 81 | - |
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| Payments for sale of shares of subsidiaries resulting in change in scope of consolidation | - | - | - | - | - | - | - | -1 |
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| Payments for investments in capital | - | - | - | - | - | -20 | -0 | -0 |
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| An income by the refund of the investment | - | - | - | - | - | - | - | 0 |
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| Payments of guarantee deposits | - | -0 | -5 | -4 | -12 | -6 | -18 | -17 |
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| Proceeds from refund of guarantee deposits | - | - | - | - | - | - | 1 | 2 |
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| Loan advances | - | - | - | - | - | - | - | -34 |
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| Proceeds from collection of loans receivable | - | - | - | - | - | - | 0 | 7 |
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| Payments into time deposits | - | - | - | - | -1 | -1 | -2 | -3 |
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| Proceeds from withdrawal of time deposits | - | - | - | - | - | - | 1 | - |
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| Other, net | - | - | - | - | 0 | -11 | -2 | -1 |
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| Net cash provided by (used in) investing activities | - | -877 | -146 | -222 | -206 | -236 | -896 | -625 |
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| Proceeds from short-term borrowings | - | 27 | 218 | 110 | 485 | 73 | 3,198 | 5,639 |
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| Repayments of short-term borrowings | - | -98 | -196 | -100 | -340 | -327 | -1,429 | -5,750 |
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| Proceeds from long-term borrowings | - | 1,193 | - | 497 | 475 | 77 | 201 | 120 |
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| Repayments of long-term borrowings | - | -9 | -122 | -1,009 | -691 | -85 | -115 | -213 |
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| Proceeds from issuance of bonds | - | - | - | - | - | - | - | 1,040 |
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| Proceeds from issuance of share acquisition rights | - | 30 | - | 6 | 9 | 36 | 58 | 42 |
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| Payments for the issuance of stock acquisition rights | - | -7 | - | -2 | -5 | -10 | -11 | -15 |
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| Payments for purchase of treasury subscription right to share-FinCF | - | - | - | - | -5 | - | -0 | - |
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| Proceeds from issuance of shares | 68 | 661 | 333 | 437 | 311 | 1,419 | 2,919 | 700 |
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| Proceeds from share issuance to non-controlling shareholders | - | - | - | - | - | - | 8 | 8 |
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| Repayments of lease liabilities | - | - | - | - | -3 | -1 | -2 | -64 |
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| Proceeds from sale of shares of subsidiaries not resulting in change in scope of consolidation | - | - | - | - | - | - | - | 0 |
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| Other, net | - | - | - | - | - | 11 | -0 | -0 |
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| Net cash provided by (used in) financing activities | 68 | 1,760 | 210 | -60 | 178 | 1,191 | 4,828 | 1,506 |
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| Net increase (decrease) in cash and cash equivalents | 38 | 93 | 206 | -376 | 14 | -10 | 618 | -591 |
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