- Ryugasaki City Council | Ryugasaki City Office, 3710, Ryugasaki City, Ibaraki Prefecture, 301-8611 | Ryugasaki City Office
- Fumaki Water Level Observatory, Kokai River Left Bank 0.3K | Kotorikoyamachi, Ryugasaki City, Ibaraki Prefecture | Shimodate River Office
- Nakago Water Level Observatory, Kokai River Left Bank 5.2K | Kawarashiromachi, Ryugasaki City, Ibaraki Prefecture | Tone River Downstream River Office
NOT FOUND
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