| 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 | 414 | 524 | 372 | 455 | 586 | 724 | 651 | 950 | 1,238 | 1,744 |
|---|
| Depreciation | 26 | 32 | 50 | 51 | 48 | 47 | 41 | 33 | 112 | 106 |
|---|
| Amortization of goodwill | - | - | - | - | - | - | - | 29 | 72 | 72 |
|---|
| Increase (decrease) in allowance for doubtful accounts | 0 | 0 | 0 | -0 | -0 | - | -0 | -0 | -0 | 5 |
|---|
| Increase (decrease) in provision for bonuses | 62 | 7 | -50 | 58 | 32 | 6 | -19 | 26 | 87 | -72 |
|---|
| Increase (decrease) in provision for bonuses for directors (and other officers) | 9 | 8 | -8 | 3 | 8 | 6 | -5 | 13 | 22 | 17 |
|---|
| Increase (decrease) in retirement benefit liability | - | - | - | - | - | - | - | 15 | 14 | 11 |
|---|
| Increase (decrease) in provision for loss on orders received | 20 | -13 | 13 | -19 | -1 | 6 | 3 | 59 | -59 | 66 |
|---|
| Increase (decrease) in provision for shareholder benefit program | - | - | 4 | 3 | 5 | 4 | 3 | -3 | 1 | -18 |
|---|
| Interest and dividend income | -1 | -1 | -1 | -1 | -2 | -2 | -3 | -3 | -2 | -2 |
|---|
| Fiduciary obligation fee | - | - | -3 | -4 | -6 | -3 | -7 | -4 | -9 | -13 |
|---|
| Subsidy income | -40 | -5 | -1 | -5 | -7 | -6 | -20 | -3 | -10 | -1 |
|---|
| Interest expenses | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Loss on retirement of property, plant and equipment | - | - | - | - | - | - | - | 2 | 4 | - |
|---|
| Decrease (increase) in trade receivables | -298 | -90 | -110 | -108 | -93 | -309 | 19 | -64 | -142 | -604 |
|---|
| Decrease (increase) in inventories | -27 | -34 | 29 | 31 | 21 | -31 | -15 | 10 | 27 | 14 |
|---|
| Increase (decrease) in trade payables | 63 | 58 | -180 | -9 | 87 | 79 | -44 | 1 | 58 | 110 |
|---|
| Increase (decrease) in accrued consumption taxes | 134 | -99 | -19 | 18 | 21 | 47 | -29 | 19 | -7 | 80 |
|---|
| Increase (decrease) in contract liabilities | - | - | - | - | - | - | - | -28 | -22 | 46 |
|---|
| Decrease (increase) in other current assets | 3 | -8 | -10 | 2 | -11 | -14 | -4 | -11 | -10 | 2 |
|---|
| Increase (decrease) in other current liabilities | 13 | 17 | -4 | 50 | 27 | -48 | -8 | 18 | 29 | 83 |
|---|
| Subtotal | 408 | 486 | 145 | 482 | 744 | 506 | 627 | 992 | 1,406 | 1,648 |
|---|
| Interest and dividends received | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 2 | 2 |
|---|
| Proceeds from fiduciary obligation fee | - | - | 3 | 4 | 6 | 4 | 7 | 4 | 9 | 13 |
|---|
| Subsidies received | 40 | 5 | 1 | 5 | 7 | 6 | 20 | 3 | 10 | 1 |
|---|
| Interest paid | -2 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
|---|
| Income taxes paid | -121 | -259 | -181 | -112 | -177 | -251 | -257 | -217 | -444 | -538 |
|---|
| Net cash provided by (used in) operating activities | 327 | 233 | -31 | 379 | 581 | 266 | 399 | 794 | 982 | 1,125 |
|---|
| Payments into time deposits | -5 | -5 | -5 | -5 | -5 | -5 | -5 | -5 | -5 | -5 |
|---|
| Purchase of investment securities | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 |
|---|
| Purchase of property, plant and equipment and intangible assets | - | - | - | - | - | -29 | -17 | -22 | -150 | -75 |
|---|
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | - | - | - | - | - | - | - | -162 | -791 | - |
|---|
| Payments of guarantee deposits | - | -54 | -3 | -4 | -18 | - | - | -2 | -25 | -0 |
|---|
| Proceeds from refund of guarantee deposits | - | - | - | - | - | - | - | 1 | 0 | 0 |
|---|
| Proceeds from collection of short-term loans receivable | - | - | - | - | - | - | - | - | 330 | - |
|---|
| Purchase of golf club membership | - | - | - | - | - | - | - | - | - | -38 |
|---|
| Net cash provided by (used in) investing activities | -57 | -77 | -126 | -26 | -42 | -36 | -25 | -107 | -644 | -122 |
|---|
| Proceeds from issuance of shares | - | 572 | - | - | - | 2 | - | - | 3 | - |
|---|
| Dividends paid | -19 | -19 | -153 | -108 | -108 | -126 | -162 | -168 | -287 | -368 |
|---|
| Purchase of treasury shares | -18 | - | -0 | - | - | - | -0 | -3 | -2 | -1 |
|---|
| Net cash provided by (used in) financing activities | -16 | 467 | -154 | -108 | -121 | -123 | -162 | -171 | -287 | -369 |
|---|
| Net increase (decrease) in cash and cash equivalents | 254 | 623 | -311 | 245 | 417 | 106 | 212 | 516 | 51 | 634 |
|---|