| （単位：十億円） | 4Q18 | 1Q19 | 2Q19 | 3Q19 | 4Q19 | 1Q20 | 2Q20 | 3Q20 | 4Q20 | 1Q21 | 2Q21 | 3Q21 | 4Q21 | 1Q22 | 2Q22 | 3Q22 | 4Q22 | 1Q23 | 2Q23 | 3Q23 | 4Q23 | 1Q24 | 2Q24 | 3Q24 | 4Q24 | 1Q25 | 2Q25 | 3Q25 | 4Q25 | 1Q26 | 2Q26 | 3Q26 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 現金同等物 | - | - | - | - | 8 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 1 | - | - | - | 2 | - | - | - |
| 現金 + 有価証券 | - | - | - | - | 8 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 0 | - | - | - | 1 | - | - | - | 2 | - | - | - |
| 流動資産合計 | - | - | 8 | - | 8 | - | 1 | - | 1 | - | 1 | - | 1 | - | 1 | - | 1 | - | 1 | - | 1 | - | 1 | - | 1 | - | - | - | 2 | - | - | - |
| 有形固定資産 | - | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 25 | 26 | 25 | 25 | 24 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 23 | 23 | 22 | 22 |
| 投資有価証券 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 | - | - | - |
| 固定資産合計 | - | - | 159 | - | 159 | - | 159 | - | 159 | - | 159 | - | 159 | - | 159 | - | 159 | - | 129 | - | 129 | - | 129 | - | 129 | - | - | - | 129 | - | - | - |
| 総資産 | - | 4,016 | 4,041 | 4,077 | 4,071 | 4,047 | 4,052 | 4,021 | 3,937 | 4,119 | 4,222 | 4,338 | 4,313 | 4,372 | 4,344 | 4,519 | 4,636 | 4,432 | 4,185 | 4,205 | 4,286 | 4,325 | 4,343 | 4,517 | 4,435 | 4,532 | 4,519 | 4,581 | 4,511 | 4,563 | 4,555 | 4,572 |
| 流動負債合計 | - | - | 7 | - | 7 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | - | - | 0 | - | - | - |
| 固定負債合計 | - | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | 0 | - | - | - | 0 | - | - | - |
| 総負債 | - | 3,771 | 3,794 | 3,839 | 3,827 | 3,804 | 3,805 | 3,772 | 3,709 | 3,887 | 3,989 | 4,103 | 4,074 | 4,132 | 4,103 | 4,281 | 4,406 | 4,206 | 3,991 | 4,017 | 4,091 | 4,121 | 4,145 | 4,312 | 4,222 | 4,324 | 4,307 | 4,370 | 4,305 | 4,349 | 4,333 | 4,344 |
| 利益剰余金 | - | 122 | 124 | 124 | 125 | 125 | 127 | 127 | 127 | 128 | 128 | 127 | 129 | 130 | 131 | 132 | 132 | 133 | 135 | 136 | 136 | 138 | 139 | 140 | 141 | 143 | 145 | 146 | 148 | 149 | 152 | 154 |
| 株主資本 | 130 | 245 | 247 | 238 | 244 | 242 | 247 | 249 | 227 | 232 | 232 | 235 | 238 | 240 | 241 | 238 | 230 | 226 | 194 | 188 | 195 | 203 | 198 | 205 | 213 | 208 | 212 | 210 | 206 | 214 | 222 | 229 |