Development Projects In Progress And Development Projects In Progress And Liabilities And Net Dredger Net、浚渫船（純額）、自己株式の取得
- 【期間】
| 年度 | Development Projects In Progress And Development Projects In Progress And Liabilities And Net Dredger Net | 浚渫船（純額） | 自己株式の取得 |
|---|
| 2008/03 | - | | 17.6億 | | -5百万 | |
| 2009/03 | - | | 12.6億 | -28.3% | -1百万 | 赤縮 |
| 2010/03 | - | | 10.1億 | -20.1% | 0 | +100% |
| 2011/03 | - | | 9.4億 | -6.9% | 0 | |
| 2012/03 | - | | 5.4億 | -42.6% | 0 | |
| 2013/03 | - | | 7.42億 | +37.4% | 0 | |
| 2014/03 | - | | 10.9億 | +46.6% | - | |
| 2015/03 | - | | 9.35億 | -14.1% | - | |
| 2016/03 | - | | 7.17億 | -23.3% | - | |
| 2017/03 | - | | 5.87億 | -18.1% | - | |
| 2018/03 | - | | 4.81億 | -18.1% | - | |
| 2019/03 | - | | 4.14億 | -13.9% | - | |
| 2020/03 | - | | 4.17億 | +0.7% | - | |
| 2021/03 | - | | 2.58億 | -38.1% | - | |
| 2022/03 | - | | 9.19億 | +256.2% | - | |
| 2023/03 | - | | 8.82億 | -4% | - | |
| 2024/03 | - | | 6.59億 | -25.3% | - | |
| 2025/03 | - | | 4.55億 | -31% | - | |
