Nomizo Falls and Kameiwa Cave represent one of Japan's most photographed natural phenomena, located in Kimitsu City, Chiba Prefecture. The site gained international attention in recent years through social media, particularly for the heart-shaped light formation that appears twice annually when sunlight passes through the cave opening and reflects on the water below.
The cave itself is a natural tunnel formation approximately 20 meters long, carved through rock over centuries by the flowing waters of Nomizo Falls. Local residents have long known about this scenic spot, but it remained relatively obscure until around 2015 when photographs of the heart-shaped reflection began circulating online. The phenomenon occurs specifically during the spring and autumn equinoxes in March and September, when the sun's angle aligns perfectly to create the distinctive shape visible for a brief period early in the morning.
Visitors to Kameiwa Cave can walk through the shallow stream that flows beneath the rock tunnel, though the water level varies by season. The surrounding forest provides a tranquil setting year-round, with lush greenery in summer and vibrant foliage in autumn. Photography enthusiasts should note that capturing the famous heart reflection requires precise timing and favorable weather conditions, typically around dawn during the equinox periods. Even outside these times, the cave and waterfall offer an attractive natural landscape worth exploring.
The site is accessible from Kazusa-Kururi Station on the JR Kururi Line, located approximately 30 minutes by car or taxi from the station. Public transportation to the immediate area is limited, making a rental car the most practical option for most travelers. The journey from central Tokyo takes roughly 90 minutes by car via the Tateyama Expressway. There is no admission fee to visit Nomizo Falls and Kameiwa Cave, as it remains an open natural site. A small parking area accommodates visitors.
