This video features a visit to the stunning Kuronoiwa-buro (黒根岩風呂), an outdoor seaside onsen located in Kitagawa Onsen (北川温泉) on the Izu Peninsula, Shizuoka Prefecture. The host travels through some of Izu’s most noted hot spring destinations, including Hakoneso Ryokan in Hakone and the Yumeguri-no-Yado Yoshiharu in Izu Nagaoka, before highlighting Kuronoiwa-buro as a must-visit day-trip onsen experience.

Kuronoiwa-buro is renowned for its proximity to the sea—so close, in fact, that guests can hear the gentle sound of waves while soaking in the open-air bath and enjoy sweeping, unobstructed views of the Pacific Ocean. The unique setting gives the impression of bathing at the edge of Japan, with a famously wide, scenic horizon. The video notes that on especially clear days, it feels as if distant lands like America might even be visible—an often cited local phrase to describe the sense of openness.

This is a highly recommended location for those looking for a dramatic onsen experience in nature. Kitagawa Onsen is known for its rustic charm, and Kuronoiwa-buro stands out for its extraordinary coastal views and accessibility as a day-trip hot spring, not requiring an overnight stay. Shizuoka Prefecture and the Izu Peninsula remain popular with travelers seeking hot springs, seaside relaxation, and the healing atmosphere of Japan’s countryside.

Nearby, Izu Nagaoka is famed for its variety of ryokan and onsen, making the region a perfect destination for hot spring hopping. Hakone, while not directly featured in this video, is another onsen hotspot with easy access from central Japan, offering a contrast to Izu’s more rugged coastal scenery. The video captures not just the onsen itself, but also the journey and the essence of Japanese hot spring culture, providing potential visitors with valuable insight into the region’s bathing traditions and unmatched oceanfront settings.