| City | 2026 Pop. ↓ |
|---|---|
| Sapporo | 2,066,420 |
| Saitama | 1,542,972 |
| Sendai | 1,222,410 |
| Sakai | 860,573 |
| Sagamihara | 804,396 |
| Shizuoka | 790,713 |
| Suita | 399,321 |
| Shimonoseki | 344,283 |
| Sasebo | 328,317 |
| Saga | 314,923 |
| Suzuka | 264,127 |
| Soka | 252,595 |
| Sakura | 227,779 |
| Shunan | 185,660 |
| Sayama | 174,582 |
| Seto | 172,501 |
| Sano | 156,891 |
| Sanda | 147,456 |
| Saijo | 141,453 |
| Sakado | 135,357 |
| Sakata | 135,354 |