Nature & Hike · Kimitsu
Nomizo Falls and Kameiwa Cave 濃溝の滝・亀岩の洞窟
Hand-dug river tunnel where morning light forms a heart shape on the water in spring and autumn.
PriceFree
Time needed30-60 min
Best timeLate March and late September mornings
AddressSasa, Kimitsu, Chiba 292-0526
About
Kameiwa Cave was cut by hand during the Edo period to reroute the Sasa River. On clear mornings around late March and late September, sunlight through the cave reflects on the water to make a heart shape, which became famous on social media. Short trails explore the surrounding Shimizu Keiryu Park.
Highlights
- Heart-shaped light reflection
- Edo-period hand-cut tunnel
- Mossy stream setting
- Short walks in Shimizu Keiryu Park
Tips
- The heart appears around 6:00-7:00 near the spring and autumn equinoxes
- A car is easiest; parking available
Open in Google Maps · Info checked 2026-10-11
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