| Mar 31,
2019 | Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 | Mar 31,
2024 |
|---|
| Profit (loss) before income taxes | 1,115 | 1,182 | 1,442 | 715 | 157 | 618 |
|---|
| Depreciation | 635 | 670 | 701 | 742 | 756 | 611 |
|---|
| Impairment losses | - | - | - | 12 | 439 | 153 |
|---|
| Loss on retirement of non-current assets | 6 | 19 | 20 | 27 | 25 | 24 |
|---|
| Loss (gain) on sale of non-current assets | - | - | -2 | 0 | - | 0 |
|---|
| Loss (gain) on sale of golf club membership | - | - | - | - | - | 1 |
|---|
| Interest and dividend income | -3 | -1 | -2 | -1 | -1 | -2 |
|---|
| Decrease (increase) in accounts receivable - trade, and contract assets | - | - | - | - | -305 | -114 |
|---|
| Decrease (increase) in inventories | -12 | -18 | -35 | 28 | 8 | 8 |
|---|
| Decrease (increase) in advance payments to suppliers | 5 | -28 | -12 | 24 | -7 | -8 |
|---|
| Decrease (increase) in prepaid expenses | - | 1 | 15 | -47 | -41 | 18 |
|---|
| Increase (decrease) in allowance for doubtful accounts | 95 | 16 | -31 | -4 | 1 | 4 |
|---|
| Increase (decrease) in trade payables | 292 | 55 | -324 | -443 | 232 | -239 |
|---|
| Increase (decrease) in accrued consumption taxes | - | - | 7 | -83 | 27 | 45 |
|---|
| Increase (decrease) in advances received | 11 | 8 | 39 | 30 | -2 | -0 |
|---|
| Increase (decrease) in contract liabilities | - | - | - | - | 132 | 179 |
|---|
| Increase (decrease) in provision for bonuses | 36 | 22 | 6 | 5 | -17 | 7 |
|---|
| Increase (decrease) in provision for retirement benefits | -2 | -3 | 12 | 8 | 12 | 22 |
|---|
| Increase (decrease) in provision for retirement benefits for directors (and other officers) | -22 | 4 | 4 | 4 | -5 | 5 |
|---|
| Increase (decrease) in accounts payable - other | 97 | -120 | -10 | -7 | 19 | 48 |
|---|
| Other, net | -41 | 44 | 15 | -17 | 25 | -7 |
|---|
| Subtotal | 1,940 | 1,644 | 2,676 | 1,173 | 1,454 | 1,371 |
|---|
| Interest and dividends received | 3 | 1 | 2 | 1 | 1 | 2 |
|---|
| Income taxes paid | -377 | -326 | -243 | -659 | -116 | -182 |
|---|
| Net cash provided by (used in) operating activities | 1,565 | 1,318 | 2,434 | 515 | 1,339 | 1,191 |
|---|
| Purchase of property, plant and equipment | -609 | -680 | -588 | -736 | -620 | -511 |
|---|
| Proceeds from sale of property, plant and equipment | 0 | - | 5 | - | 0 | 0 |
|---|
| Purchase of intangible assets | -106 | -107 | -57 | -70 | -167 | -47 |
|---|
| Proceeds from sale of golf club membership | - | - | - | - | - | 16 |
|---|
| Payments into time deposits | -282 | -284 | -277 | -1,679 | -2,867 | -2,869 |
|---|
| Proceeds from withdrawal of time deposits | 282 | 284 | 277 | 279 | 1,677 | 2,869 |
|---|
| Other, net | -38 | -19 | -13 | -1 | -33 | 19 |
|---|
| Net cash provided by (used in) investing activities | -753 | -806 | -653 | -2,207 | -2,010 | -523 |
|---|
| Purchase of treasury shares | - | - | - | -0 | - | -0 |
|---|
| Repayments of lease liabilities | -1 | -3 | -3 | -3 | -3 | -3 |
|---|
| Dividends paid | -194 | -194 | -136 | -375 | -283 | -283 |
|---|
| Net cash provided by (used in) financing activities | -235 | -237 | -179 | 1,119 | -286 | -286 |
|---|
| Net increase (decrease) in cash and cash equivalents | 577 | 276 | 1,602 | -573 | -957 | 382 |
|---|