| Jun 30, 2017 | Jun 30, 2018 | Jun 30, 2019 | Jun 30, 2020 | Jun 30, 2021 | Jun 30, 2022 | Jun 30, 2023 |
|---|
| Net sales | 2,563 | 2,746 | 2,718 | 2,894 | 3,191 | 3,055 | 3,011 |
|---|
| Cost of sales | 1,116 | 1,221 | 1,277 | 1,358 | 1,495 | 1,422 | 1,406 |
|---|
| Operating expenses | 1,071 | 1,208 | 1,209 | 1,253 | 1,250 | 1,195 | 1,162 |
|---|
| Gross profit (loss) | 1,447 | 1,525 | 1,441 | 1,537 | 1,696 | 1,634 | 1,605 |
|---|
| Operating profit (loss) | 377 | 317 | 232 | 283 | 446 | 438 | 444 |
|---|
| Selling, general and administrative expenses | 1,071 | 1,208 | 1,209 | 1,253 | 1,250 | 1,195 | 1,162 |
|---|
| Interest income | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Subsidy income | - | - | - | 0 | 1 | 0 | 1 |
|---|
| Dividend income of insurance | - | - | - | - | - | 0 | - |
|---|
| Dividend income of insurance | - | - | - | - | - | 0 | - |
|---|
| Other | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Other | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Non-operating income | 0 | 0 | 0 | 14 | 3 | 0 | 1 |
|---|
| Non-operating income | 0 | 0 | 0 | 14 | 3 | 0 | 1 |
|---|
| Operating profit (loss) | 377 | 317 | 232 | 283 | 446 | 438 | 444 |
|---|
| Commission expenses | 1 | - | - | - | - | - | 4 |
|---|
| Non-operating expenses | 1 | 0 | 17 | - | 0 | - | 5 |
|---|
| Settlement payments | - | - | - | - | - | - | 2 |
|---|
| Non-operating expenses | 1 | 0 | 17 | - | 0 | - | 5 |
|---|
| Interest income | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Subsidy income | - | - | - | 0 | 1 | 0 | 1 |
|---|
| Dividend income of insurance | - | - | - | - | - | 0 | - |
|---|
| Dividend income of insurance | - | - | - | - | - | 0 | - |
|---|
| Other | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Other | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Non-operating income | 0 | 0 | 0 | 14 | 3 | 0 | 1 |
|---|
| Non-operating income | 0 | 0 | 0 | 14 | 3 | 0 | 1 |
|---|
| Ordinary profit (loss) | 376 | 318 | 215 | 298 | 449 | 438 | 439 |
|---|
| Commission expenses | 1 | - | - | - | - | - | 4 |
|---|
| Non-operating expenses | 1 | 0 | 17 | - | 0 | - | 5 |
|---|
| Settlement payments | - | - | - | - | - | - | 2 |
|---|
| Non-operating expenses | 1 | 0 | 17 | - | 0 | - | 5 |
|---|
| Loss on retirement of non-current assets | 4 | 8 | - | 7 | 0 | - | - |
|---|
| Extraordinary losses | 16 | 10 | - | 7 | 0 | - | - |
|---|
| Ordinary profit (loss) | 376 | 318 | 215 | 298 | 449 | 438 | 439 |
|---|
| Profit (loss) before income taxes | 361 | 308 | 215 | 341 | 449 | 438 | 439 |
|---|
| Loss on retirement of non-current assets | 4 | 8 | - | 7 | 0 | - | - |
|---|
| Extraordinary losses | 16 | 10 | - | 7 | 0 | - | - |
|---|
| Income taxes - current | 102 | 106 | 62 | 95 | 156 | 148 | 148 |
|---|
| Profit (loss) before income taxes | 361 | 308 | 215 | 341 | 449 | 438 | 439 |
|---|
| Income taxes - deferred | 13 | -1 | 5 | -3 | -8 | -0 | -2 |
|---|
| Income taxes - current | 102 | 106 | 62 | 95 | 156 | 148 | 148 |
|---|
| Income taxes | 115 | 104 | 67 | 92 | 148 | 148 | 145 |
|---|
| Income taxes - deferred | 13 | -1 | 5 | -3 | -8 | -0 | -2 |
|---|
| Profit (loss) | 246 | 204 | 148 | 250 | 301 | 290 | 294 |
|---|
| Income taxes | 115 | 104 | 67 | 92 | 148 | 148 | 145 |
|---|
| Profit (loss) | 246 | 204 | 148 | 250 | 301 | 290 | 294 |
|---|
| Profit (loss) attributable to owners of parent | 246 | 204 | 148 | 250 | 301 | 290 | 294 |
|---|