Enjoy dreamlike scenery and water play in the shallows around Kameiwa Cave
About this spot
This is a signature river-play spot of the Boso Peninsula, known for Nomizo Falls and Kameiwa Cave (in 2026 a partial closure due to falling-rock and landslide risk was lifted on July 2, but the latest information should be checked). The scenery of light streaming from the cave and reflecting on the water has become a talking point on social media, and it is popular as a photogenic spot. In the shallows nearby, even small children can touch the water safely alongside a guardian. Wrapped in deep green nature, it makes for a stretch of time where you can enjoy both the dreamlike scenery and water play.
Season & hours
Name: 清水渓流広場(濃溝の滝・亀岩の洞窟)
Date & time: 常時開放(2026年は落石・土砂崩れリスクによる一部通行止めが7/2に解除済み・最新情報は要確認)
Venue: 君津市笹・笹川上流
Tips
Check the latest situation regarding falling rocks and path closures on the Kimitsu City official website before you visit. The area around the photo spot can get crowded, so early morning and evening tend to be calmer. The riverbed has many slippery rocks, so shoes you do not mind getting wet are reassuring.
Best time to visit
Around 13:00 to 15:00, when the sun is strong, is the most pleasant time to be in the water
Access & map
Sasa, Kimitsu City - upper Sasa River
Model course featuring this spot
2026 Kiyomizu Keiryu Hiroba (Nomizo Falls and Kameiwa Cave) Full-Day Course
Chiba
Explore features & model courses
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