| Net sales | 152,410a | 125,930a | 110,054a | 95,308a | 81,591a | 100,031a |
| Cost of sales | -67,755a | -52,110a | -48,736a | -42,567a | -40,643a | -62,809a |
| Gross profit | 84,654a | 73,819a | 61,317a | 52,741a | 40,947a | 37,222a |
| Selling, general and administrative expenses | -27,572a | -23,006a | -18,408a | -18,145a | -18,119a | -19,078a |
| Operating income | 57,081a | 50,812a | 42,909a | 34,596a | 22,827a | 18,144a |
| Non-operating income | — | — | — | — | — | — |
| Interest income | 1,159a | 396a | 40a | 65a | 271a | 171a |
| Dividend income | 27a | 24a | 20a | 19a | 18a | 16a |
| Exchange gain, net | 2,303a | 314a | 716a | 611a | | 362a |
| Subsidy income | | | | 52a | 86a | |
| Compensation for damage | | | | 130a | | |
| Gain on liquidation of subsidiaries | | | 761a | | | |
| Other | 116a | 128a | 320a | 155a | 104a | 422a |
| Total | 3,606a | 864a | 1,859a | 1,035a | 480a | 974a |
| Non-operating expenses | — | — | — | — | — | — |
| Interest expense | -60a | -44a | -49a | -72a | -74a | -80a |
| Commission fees | | | | -46a | -69a | -69a |
| Additionally paid retirement benefits | | | -197a | | | -601a |
| Litigation expenses | | -71a | -92a | | | |
| Commission for purchase of treasury stock | | -25a | | | | |
| Social contribution activity-related expenses | -1,029a | | | | | |
| Office transfer expenses | | | | | | |
| Exchange losses, net | | | | | -93a | |
| Loss on liquidation of subsidiaries | | | | -452a | | |
| Other | -176a | -165a | -101a | -214a | -113a | -173a |
| Total | -1,265a | -307a | -439a | -786a | -350a | -924a |
| Ordinary income | 59,422a | 51,369a | 44,330a | 34,845a | 22,957a | 18,194a |
| Special income | 410a | | | | | |
| Special losses | -549a | -225a | -8a | -16a | -67a | -423a |
| Net income before income taxes | 59,282a | 51,143a | 44,322a | 34,828a | 22,890a | 17,770a |
| Income taxes-current | -13,851a | -16,895a | -10,987a | -10,084a | -8,472a | -6,603a |
| Income taxes-deferred | -2,056a | -2,488a | -780a | -179a | -1,531a | -1,385a |
| Total | -15,908a | -14,406a | -11,768a | -9,905a | -6,941a | -5,218a |
| Net income | 43,374a | 36,737a | 32,553a | 24,923a | 15,949a | 12,551a |
| Net income attributable to owners of the parent | 43,374a | 36,737a | 32,553a | 24,923a | 15,949a | 12,551a |