The island is home to the Japanese rock fern, which is rare in this region of Japan.
The park's cliffs are formed from layers of volcanic ash and tuff dating back to the late Miocene epoch.
The island was historically significant as a lookout point for the Edo shogunate due to its strategic position guarding Tokyo Bay.
During the Meiji period, the area was used for military lighthouse infrastructure.
The Umiu birds observed here are protected under regional wildlife preservation ordinances.
Jogashima Park occupies the eastern end of Jogashima Island, the southernmost point of the Miura Peninsula. The park is renowned for its expansive coastal views of Sagami Bay and the Pacific Ocean, often featuring sightings of Mount Fuji on clear days. It is a primary habitat for the Umiu (Temminck's cormorant), which nest and roost along the rugged cliffs during winter months. Approximately 200,000 narcissus (daffodil) plants bloom across the park grounds between late December and February. The landscape consists of a mix of manicured walking paths and exposed, wind-swept maritime flora. Geological formations, including distinct sea stacks and rock shelves, define the shoreline. The park serves as a migration stop for various avian species due to its position at the edge of the peninsula. Facilities include elevated observation decks providing panoramic vistas of the surrounding maritime traffic.
The dramatic sea arch formation known as 'Umanose-domon' located along the western coastal trail.
Bring sturdy, non-slip footwear for exploring the uneven, rocky shoreline.
Carry wind-resistant clothing, as the exposed cliffside area experiences high gusts year-round.
Visit the park's eastern observation deck for the best chance to see Mount Fuji during the sunset hours.
Attempting to climb the unstable cliff faces or walking on seaweed-slicked rocks near the water line.
Stay on marked trails to protect the fragile coastal vegetation and avoid disturbing nesting bird colonies.
