| (百万円) | 2014/03 | 2015/03 | 2016/03 | 2017/03 | 2018/03 | 2019/03 | 2020/03 | 2021/03 | 2022/03 | 2023/03 | 2024/03 |
| 当社株主資本 | 1,919,346 | 2,152,198 | 2,310,431 | 2,507,698 | 2,682,424 | 2,897,074 | 2,993,608 | 3,028,456 | 3,304,196 | 3,543,607 | 3,941,466 |
| 株主資本比率 | 21.2％ | 18.8％ | 21.0％ | 22.3％ | 23.5％ | 23.8％ | 22.9％ | 22.3％ | 23.1％ | 23.2％ | 24.1％ |