| Mar 31, 2013 | Mar 31, 2014 | Mar 31, 2015 | Mar 31, 2016 | Mar 31, 2017 | Mar 31, 2018 | Mar 31, 2019 | Mar 31, 2020 |
|---|
| Profit (loss) before income taxes | 695 | 1,080 | 1,427 | 1,610 | 985 | 636 | 380 | 197 |
|---|
| Depreciation | 1,028 | 1,038 | 1,099 | 1,128 | 1,094 | 1,288 | 1,599 | 1,645 |
|---|
| Impairment loss | 4 | 8 | 15 | 17 | 3 | 26 | 24 | - |
|---|
| Increase (decrease) in provision for bonuses for directors (and other officers) | -3 | 1 | 1 | -2 | 0 | -0 | - | -4 |
|---|
| Increase (decrease) in provision for product warranties | -3 | -6 | -5 | -0 | 2 | -3 | -7 | -9 |
|---|
| Increase (decrease) in provision for retirement benefits for directors (and other officers) | 28 | -98 | 14 | 15 | 15 | -11 | 0 | 51 |
|---|
| Increase (decrease) in retirement benefit liability | - | 47 | 1 | 16 | 18 | 25 | -21 | 40 |
|---|
| Decrease (increase) in retirement benefit asset | - | - | -47 | -112 | -69 | -70 | -86 | -77 |
|---|
| Interest and dividend income | -22 | -30 | -34 | -37 | -26 | -23 | -21 | -16 |
|---|
| Interest expenses | 2 | 2 | 2 | - | - | - | - | 1 |
|---|
| Loss (gain) on sales of property, plant and equipment | - | - | - | - | - | - | -52 | -113 |
|---|
| Loss on retirement of property, plant and equipment | 16 | 17 | 12 | 21 | 7 | 21 | 16 | 7 |
|---|
| Loss on liquidation of subsidiaries and associates | - | - | - | - | - | - | 55 | - |
|---|
| Loss (gain) on liquidation of subsidiaries and associates | - | - | - | - | - | - | - | -82 |
|---|
| Decrease (increase) in trade receivables | 766 | -355 | -241 | 707 | -334 | -500 | -383 | 141 |
|---|
| Decrease (increase) in inventories | -492 | -11 | 105 | -202 | 2 | -127 | -299 | -74 |
|---|
| Decrease (increase) in other current assets | -1 | -3 | -30 | -56 | 36 | -7 | -28 | 12 |
|---|
| Increase (decrease) in trade payables | -429 | 11 | 208 | -319 | 210 | -367 | 74 | -196 |
|---|
| Increase (decrease) in accounts payable - other | -39 | 83 | -120 | -123 | 14 | 65 | 25 | 40 |
|---|
| Increase (decrease) in accrued expenses | -9 | 6 | 23 | -18 | 2 | 39 | 20 | -21 |
|---|
| Increase (decrease) in accrued consumption taxes | 10 | -4 | 42 | -72 | 49 | -24 | -24 | 104 |
|---|
| Increase (decrease) in other current liabilities | 0 | -8 | -213 | -2 | 13 | 2 | 6 | -9 |
|---|
| Other, net | 3 | -34 | -116 | 104 | 37 | -95 | 1 | 28 |
|---|
| Subtotal | 1,981 | 2,820 | 2,482 | 2,106 | 1,800 | 940 | 1,503 | 1,675 |
|---|
| Interest and dividends received | 22 | 30 | 34 | 37 | 26 | 23 | 20 | 16 |
|---|
| Interest paid | - | - | - | - | - | - | - | -1 |
|---|
| Income taxes paid | -146 | -391 | -263 | -504 | -147 | -202 | -131 | -64 |
|---|
| Net cash provided by (used in) operating activities | 1,931 | 2,274 | 2,301 | 1,639 | 1,734 | 761 | 1,393 | 1,626 |
|---|
| Purchase of property, plant and equipment | -714 | -1,101 | -1,360 | -1,329 | -1,770 | -1,735 | -2,900 | -2,969 |
|---|
| Proceeds from sales of property, plant and equipment | 1 | 50 | 17 | 22 | 2 | 64 | 104 | 93 |
|---|
| Purchase of software | - | - | - | - | - | - | -15 | -66 |
|---|
| Proceeds from the liquidation of subsidiaries and associates | - | - | - | - | - | - | - | 142 |
|---|
| Other, net | -24 | -4 | -27 | -12 | -4 | -8 | -3 | 1 |
|---|
| Net cash provided by (used in) investing activities | -695 | -926 | -1,240 | -1,228 | -1,774 | -1,680 | -2,815 | -2,799 |
|---|
| Purchase of treasury shares | -0 | -35 | -1 | -0 | -0 | -1 | -0 | -799 |
|---|
| Dividends paid | -150 | -217 | -249 | -250 | -183 | -249 | -200 | -133 |
|---|
| Dividends paid to non-controlling interests | - | - | -11 | -10 | -14 | -14 | -11 | - |
|---|
| Repayments of finance lease obligations | - | - | - | - | - | - | -3 | -34 |
|---|
| Net cash provided by (used in) financing activities | -155 | -258 | -264 | -262 | -200 | -267 | -214 | -967 |
|---|
| Effect of exchange rate change on cash and cash equivalents | 14 | 36 | 153 | -107 | -55 | 11 | -5 | -15 |
|---|
| Net increase (decrease) in cash and cash equivalents | 1,094 | 1,126 | 951 | 42 | -294 | -1,174 | -1,641 | -2,155 |
|---|
| Decrease in cash and cash equivalents resulting from exclusion of subsidiaries from consolidation | - | - | - | - | - | - | -205 | - |
|---|