| Postal Code | Area | |
|---|---|---|
| 300-4242 | Nakasugama (中菅間) | View |
| 300-4243 | Ikeda (池田) | View |
| 300-4244 | Tanaka (田中) | View |
| 300-4245 | Mimori (水守) | View |
| 300-4246 | Kamisawa (上沢) | View |
| 300-4247 | Wadai (和台) | View |
| 300-4248 | Isobe (磯部) | View |
| 300-4249 | Horage (洞下) | View |
| 300-4251 | Tamiyama (田水山) | View |
| 300-4351 | Kamioshima (上大島) | View |
| 300-4352 | Tsukuba (筑波) | View |
| 300-4353 | Numata (沼田) | View |
| 300-4354 | Kunimatsu (国松) | View |
| 305-0001 | Kurihara (栗原) | View |
| 305-0002 | Ueno (上野) | View |
| 305-0003 | Sakura (桜) | View |
| 305-0004 | Shibasaki (柴崎) | View |
| 305-0005 | Amakubo (天久保) | View |
| 305-0006 | Tennodai (天王台) | View |
| 305-0007 | Harukazedai (春風台) | View |