| 2026 |
| 09/14 | 1,810 | 1,848 | 1,810 | 1,846 | +1.6% | 33,200 | 339億2748万 | +1.32% |
| 09/11 | 1,820 | 1,832 | 1,811 | 1,817 | -0.82% | 48,600 | 333億9449万 | -0.06% |
| 09/10 | 1,822 | 1,832 | 1,813 | 1,832 | +0.05% | 42,400 | 336億7018万 | +0.94% |
| 09/09 | 1,830 | 1,836 | 1,823 | 1,831 | -0.33% | 36,000 | 336億5180万 | +1.1% |
| 09/08 | 1,838 | 1,845 | 1,821 | 1,837 | -0.43% | 47,900 | 337億6207万 | +1.72% |
| 09/07 | 1,856 | 1,860 | 1,844 | 1,845 | -0.59% | 39,700 | 339億910万 | +2.39% |
| 09/04 | 1,851 | 1,866 | 1,841 | 1,856 | -0.16% | 43,800 | 341億1127万 | +3.23% |
| 09/03 | 1,857 | 1,874 | 1,855 | 1,859 | +0.11% | 45,500 | 341億6641万 | +3.62% |
| 09/02 | 1,900 | 1,908 | 1,850 | 1,857 | -2.47% | 101,100 | 341億2965万 | +3.69% |
| 09/01 | （IR情報）15:30 株式会社FullDepthとエイト日本技術開発の資本業務提携についてのお知らせ |
| 09/01 | 1,876 | 1,904 | 1,875 | 1,904 | +0.95% | 72,900 | 349億9346万 | +6.55% |
| 08/31 | （IR情報）15:30 (開示事項の経過)持分法適用関連会社株式の譲渡に伴う特別利益の計上に関するお知らせ |
| 08/31 | 1,870 | 1,893 | 1,849 | 1,886 | +0.8% | 57,500 | 346億6264万 | +5.84% |
| 08/28 | 1,859 | 1,877 | 1,856 | 1,871 | +0.21% | 62,900 | 343億8695万 | +5.35% |
| 08/27 | （IR情報）15:30 支配株主等に関する事項について |
| 08/27 | 1,860 | 1,881 | 1,856 | 1,867 | +0.54% | 72,200 | 343億1344万 | +5.48% |
| 08/26 | 1,830 | 1,857 | 1,830 | 1,857 | +1.7% | 73,600 | 341億2965万 | +5.15% |
| 08/25 | 1,834 | 1,840 | 1,821 | 1,826 | 0% | 36,300 | 335億5990万 | +3.63% |
| 08/24 | 1,836 | 1,838 | 1,818 | 1,826 | 0% | 62,900 | 335億5990万 | +3.75% |
| 08/21 | 1,800 | 1,835 | 1,792 | 1,826 | +2.76% | 135,400 | 335億5990万 | +3.87% |
| 08/20 | 1,764 | 1,777 | 1,761 | 1,777 | +1.08% | 57,800 | 326億5934万 | +1.14% |
| 08/19 | （IR情報）15:30 持分法適用関連会社の異動(株式譲渡)に関するお知らせ |
| 08/19 | 1,766 | 1,776 | 1,748 | 1,758 | -0.73% | 44,600 | 323億1014万 | +0.23% |
| 08/18 | 1,777 | 1,779 | 1,764 | 1,771 | -0.34% | 56,800 | 325億4906万 | +1.2% |
| 08/17 | 1,780 | 1,799 | 1,776 | 1,777 | +0.17% | 84,600 | 326億5934万 | +1.78% |
| 08/14 | 1,755 | 1,774 | 1,748 | 1,774 | +0.8% | 70,400 | 326億420万 | +1.78% |
| 08/13 | 1,754 | 1,760 | 1,744 | 1,760 | +1.21% | 65,000 | 323億4689万 | +1.21% |
| 08/12 | 1,745 | 1,752 | 1,739 | 1,739 | -0.29% | 63,000 | 319億6094万 | +0.23% |
| 08/10 | 1,762 | 1,762 | 1,739 | 1,744 | 0% | 30,700 | 320億5283万 | +0.63% |
| 08/07 | （IR情報）15:30 当社連結子会社の重要人事に関するお知らせ |
| 08/07 | 1,744 | 1,759 | 1,739 | 1,744 | +0.23% | 35,800 | 320億5283万 | +0.87% |
| 08/06 | 1,727 | 1,742 | 1,726 | 1,740 | +0.52% | 35,100 | 319億7932万 | +0.87% |
| 08/05 | 1,727 | 1,739 | 1,727 | 1,731 | +0.23% | 30,300 | 318億1391万 | +0.58% |
| 08/04 | 1,729 | 1,733 | 1,718 | 1,727 | -0.29% | 39,700 | 317億4039万 | +0.64% |
| 08/03 | 1,758 | 1,758 | 1,729 | 1,732 | -0.74% | 53,600 | 318億3228万 | +1.17% |
| 07/31 | 1,758 | 1,766 | 1,745 | 1,745 | -0.68% | 38,300 | 320億7121万 | +2.29% |
| 07/30 | 1,776 | 1,778 | 1,750 | 1,757 | -1.24% | 57,300 | 322億9176万 | +3.41% |
| 07/29 | 1,770 | 1,781 | 1,755 | 1,779 | +0.96% | 42,400 | 326億9609万 | +5.14% |
| 07/28 | 1,775 | 1,775 | 1,748 | 1,762 | -0.11% | 44,100 | 323億8365万 | +4.63% |
| 07/27 | 1,753 | 1,771 | 1,753 | 1,764 | +1.38% | 41,700 | 324億2041万 | +5.19% |
| 07/24 | 1,734 | 1,744 | 1,723 | 1,740 | +0.29% | 42,000 | 319億7932万 | +4.19% |
| 07/23 | 1,748 | 1,755 | 1,722 | 1,735 | -1.25% | 46,300 | 318億8742万 | +4.2% |
| 07/22 | 1,760 | 1,766 | 1,740 | 1,757 | -0.28% | 79,600 | 322億9176万 | +5.91% |
| 07/21 | 1,778 | 1,785 | 1,756 | 1,762 | -0.28% | 66,400 | 323億8365万 | +6.66% |
| 07/17 | 1,791 | 1,800 | 1,753 | 1,767 | -1.45% | 83,900 | 324億7555万 | +7.42% |
| 07/16 | 1,820 | 1,845 | 1,790 | 1,793 | 0% | 98,100 | 329億5340万 | +9.46% |
| 07/15 | （IR情報）15:30 株式会社気象工学研究所の完全子会社化に関するお知らせ |
| 07/15 | 1,764 | 1,811 | 1,760 | 1,793 | +5.91% | 264,900 | 329億5340万 | +10% |
| 07/14 | （IR情報）15:30 資本コストや株価を意識した経営の実現に向けた取り組みについて |
| 07/14 | （IR情報）15:30 当社創立20周年の周年記念配当の実施に関するお知らせ |
| 07/14 | （IR情報）15:30 2026年5月期決算短信〔日本基準〕(連結) |
| 07/14 | 1,681 | 1,701 | 1,678 | 1,693 | +1.68% | 67,900 | 311億1551万 | +4.44% |
| 07/13 | 1,698 | 1,707 | 1,665 | 1,665 | -0.95% | 52,700 | 306億90万 | +3.03% |
| 07/10 | 1,688 | 1,692 | 1,680 | 1,681 | +0.06% | 51,600 | 308億9496万 | +4.22% |
| 07/09 | 1,687 | 1,689 | 1,674 | 1,680 | -0.3% | 70,500 | 308億7658万 | +4.48% |
| 07/08 | 1,671 | 1,689 | 1,663 | 1,685 | +0.84% | 58,000 | 309億6848万 | +5.12% |
| 07/07 | 1,675 | 1,684 | 1,668 | 1,671 | 0% | 45,100 | 307億1117万 | +4.5% |
| 07/06 | 1,657 | 1,672 | 1,655 | 1,671 | +0.66% | 50,300 | 307億1117万 | +4.76% |
| 07/03 | 1,652 | 1,667 | 1,647 | 1,660 | +0.97% | 56,100 | 305億900万 | +4.34% |
| 07/02 | 1,628 | 1,650 | 1,626 | 1,644 | +1.54% | 48,100 | 302億1494万 | +3.4% |
| 07/01 | 1,615 | 1,625 | 1,607 | 1,619 | +0.37% | 32,000 | 297億5547万 | +1.89% |
| 06/30 | 1,623 | 1,625 | 1,609 | 1,613 | -0.43% | 60,500 | 296億4519万 | +1.38% |
| 06/29 | 1,597 | 1,620 | 1,595 | 1,620 | +2.02% | 79,900 | 297億7385万 | +1.76% |
| 06/26 | 1,581 | 1,590 | 1,576 | 1,588 | +0.51% | 31,900 | 291億8572万 | -0.31% |
| 06/25 | 1,589 | 1,601 | 1,578 | 1,580 | +0.19% | 34,500 | 290億3869万 | -1% |
| 06/24 | 1,581 | 1,594 | 1,577 | 1,577 | -0.19% | 31,600 | 289億8355万 | -1.38% |
| 06/23 | 1,583 | 1,586 | 1,576 | 1,580 | -0.63% | 43,000 | 290億3869万 | -1.37% |
| 06/22 | 1,600 | 1,602 | 1,584 | 1,590 | -0.38% | 41,200 | 292億2248万 | -1% |
| 06/19 | 1,600 | 1,600 | 1,581 | 1,596 | 0% | 53,000 | 293億3275万 | -0.75% |
| 06/18 | 1,595 | 1,604 | 1,590 | 1,596 | +0.44% | 48,400 | 293億3275万 | -0.87% |
| 06/17 | 1,586 | 1,605 | 1,586 | 1,589 | +0.25% | 43,300 | 292億410万 | -1.49% |
| 06/16 | （5%ルール）Y&K（0.98%）小谷裕司（2.23%）八雲（19.21%） |
| 06/16 | 1,595 | 1,596 | 1,576 | 1,585 | -1% | 52,200 | 291億3058万 | -1.92% |
| 06/15 | 1,601 | 1,610 | 1,598 | 1,601 | +0.76% | 51,200 | 294億2465万 | -1.11% |
| 06/12 | 1,582 | 1,594 | 1,575 | 1,589 | +0.44% | 98,900 | 292億410万 | -2.09% |
| 06/11 | 1,577 | 1,582 | 1,555 | 1,582 | +0.19% | 83,600 | 290億7545万 | -2.71% |
| 06/10 | 1,568 | 1,579 | 1,564 | 1,579 | +0.64% | 58,800 | 290億2031万 | -3.19% |
| 06/09 | 1,572 | 1,587 | 1,561 | 1,569 | -0.13% | 60,000 | 288億3652万 | -4.04% |
| 06/08 | 1,570 | 1,583 | 1,558 | 1,571 | -0.25% | 92,100 | 288億7328万 | -4.21% |
| 06/05 | 1,566 | 1,588 | 1,566 | 1,575 | +1.48% | 61,200 | 289億4679万 | -4.31% |
| 06/04 | 1,560 | 1,565 | 1,550 | 1,552 | -1.08% | 49,400 | 285億2408万 | -5.94% |
| 06/03 | 1,573 | 1,577 | 1,562 | 1,569 | -0.44% | 92,300 | 288億3652万 | -5.2% |
| 06/02 | 1,580 | 1,587 | 1,562 | 1,576 | -0.63% | 97,200 | 289億6517万 | -5.06% |
| 06/01 | 1,619 | 1,619 | 1,581 | 1,586 | -2.7% | 129,300 | 291億4896万 | -4.8% |
| 05/29 | 1,621 | 1,639 | 1,621 | 1,630 | +0.62% | 75,500 | 299億5763万 | -2.45% |
| 05/28 | （IR情報）16:00 当社の連結子会社の重要人事に関するお知らせ |
| 05/28 | （IR情報）16:00 当社の連結子会社「株式会社エイト日本技術開発」の新組織体制に関するお知らせ |
| 05/28 | 1,604 | 1,620 | 1,592 | 1,620 | -1.88% | 195,600 | 297億7385万 | -3.28% |
| 05/27 | 1,662 | 1,665 | 1,649 | 1,651 | -0.06% | 135,000 | 303億4359万 | -1.73% |
| 05/26 | 1,651 | 1,655 | 1,639 | 1,652 | +0.06% | 75,300 | 303億6197万 | -1.84% |
| 05/25 | 1,660 | 1,660 | 1,646 | 1,651 | -0.06% | 86,400 | 303億4359万 | -2.19% |
| 05/22 | 1,656 | 1,658 | 1,645 | 1,652 | -0.12% | 60,900 | 303億6197万 | -2.31% |
| 05/21 | 1,658 | 1,665 | 1,653 | 1,654 | +0.24% | 80,100 | 303億9873万 | -2.48% |
| 05/20 | 1,670 | 1,670 | 1,642 | 1,650 | -1.43% | 145,200 | 303億2521万 | -3% |
| 05/19 | 1,667 | 1,678 | 1,661 | 1,674 | +1.33% | 91,800 | 307億6631万 | -1.93% |
| 05/18 | 1,666 | 1,667 | 1,647 | 1,652 | -0.3% | 85,100 | 303億6197万 | -3.56% |
| 05/15 | 1,660 | 1,677 | 1,652 | 1,657 | +0.24% | 66,500 | 304億5387万 | -3.55% |
| 05/14 | 1,668 | 1,669 | 1,652 | 1,653 | -0.9% | 100,700 | 303億8035万 | -4.12% |
| 05/13 | 1,677 | 1,679 | 1,666 | 1,668 | -0.24% | 96,300 | 306億5603万 | -3.53% |
| 05/12 | 1,681 | 1,683 | 1,668 | 1,672 | -0.48% | 121,300 | 307億2955万 | -3.46% |
| 05/11 | 1,685 | 1,698 | 1,680 | 1,680 | -0.24% | 56,500 | 308億7658万 | -3.28% |
| 05/08 | 1,694 | 1,698 | 1,680 | 1,684 | -0.82% | 79,600 | 309億5010万 | -3.16% |
| 05/07 | 1,698 | 1,704 | 1,686 | 1,698 | +0.89% | 44,500 | 312億740万 | -2.47% |
| 05/01 | 1,695 | 1,695 | 1,676 | 1,683 | -0.71% | 50,300 | 309億3172万 | -3.55% |
| 04/30 | 1,691 | 1,698 | 1,680 | 1,695 | -0.7% | 114,800 | 311億5226万 | -3.09% |
| 04/28 | 1,681 | 1,707 | 1,679 | 1,707 | +1.55% | 67,300 | 313億7281万 | -2.57% |
| 04/27 | 1,681 | 1,691 | 1,674 | 1,681 | -0.18% | 70,800 | 308億9496万 | -4.16% |
| 04/24 | 1,701 | 1,705 | 1,684 | 1,684 | -1% | 67,300 | 309億5010万 | -4.05% |
| 04/23 | 1,711 | 1,720 | 1,692 | 1,701 | -0.47% | 97,500 | 312億6254万 | -3.3% |
| 04/22 | 1,722 | 1,726 | 1,707 | 1,709 | -0.7% | 60,600 | 314億957万 | -3.12% |
| 04/21 | 1,732 | 1,735 | 1,720 | 1,721 | -0.06% | 41,500 | 316億3012万 | -2.6% |
| 04/20 | 1,744 | 1,744 | 1,720 | 1,722 | -0.86% | 69,600 | 316億4850万 | -2.71% |
| 04/13 | （IR情報）15:30 2026年5月期第3四半期決算短信〔日本基準〕(連結) |
10年以上蓄積したファイナンスデータとAIを掛け合わせて、投資の意思決定を加速させるポジションです。
