Umanose Domon, also known as the Umanose Cave Mouth, is a striking natural rock arch located on Jogashima Island, off the southern coast of the Miura Peninsula. This geological wonder was formed by coastal erosion over centuries, creating a sea cave through which small boats once passed. However, the powerful Great Kanto Earthquake of 1923 caused a significant uplift of the land, raising the arch above sea level and transforming it into the distinctive landform seen today. It stands as a testament to the dynamic geological history of the region.
Visitors consistently praise the scenic beauty of the area and the unique appearance of the arch. Many reviewers highlight the enjoyable hike along the Jogashima horseback hiking trail, which offers good visibility and leads to the cave. The natural formation provides a picturesque backdrop, especially on clear days, making it a popular spot for photography. However, some visitors note that while the arch itself is interesting, there isn't much else to see in its immediate vicinity, and it's best appreciated as part of a larger exploration of Jogashima Island's coastline.
To make the most of your visit, wear comfortable clothing and sturdy shoes, as the path involves walking on wooded walkways, steep stone steps, and potentially cobblestones. Reviewers recommend pants and sneakers due to the uneven terrain and potential for wind. Allow at least 1-2 hours for the round trip from the main park entrance, including time for photos. The best time to visit is on a nice, clear day to fully appreciate the views. There is no dedicated parking for Umanose Domon itself, so visitors typically park at the main Jogashima parking areas and walk from there.
Umanose Domon is situated on Jogashima Island. To reach Jogashima, you can take a train to Misakiguchi Station (Keikyu Line) and then a local bus to Jogashima. Once on the island, the arch is accessible via the Jogashima horseback hiking trail. Reviewers mention starting the walk from the park entrance or Jogashima Lighthouse. The path involves descending steep stone steps to the beach level to view the cave gate properly. It's a walk along the promenade with good visibility along the way.
A common complaint among visitors is the somewhat challenging access, involving steep steps and uneven paths. To mitigate this, ensure you are prepared for a moderate hike and wear appropriate footwear. Some also feel that the arch, while unique, might not be spectacular enough on its own to justify a long journey if not combined with other attractions on Jogashima Island. Therefore, it's recommended to integrate a visit to Umanose Domon into a broader exploration of the island's natural beauty and other viewpoints.
