The Kurushima-Kaikyo Bridge, visible from the deck, is actually a complex of three interconnected suspension bridges.
The strait below is notorious for powerful tidal currents that reach speeds of up to 10 knots.
The deck is positioned at the western entrance of the Shimanami Kaido, the iconic cycling path connecting Imabari to Onomichi.
The design of the bridge was specifically engineered to withstand the frequent seismic activity of the Japanese archipelago.
Itoyama Observation Deck serves as a primary viewing point for the Kurushima-Kaikyo Bridge, the world's longest suspension bridge structure of its kind at the time of construction. The site overlooks the Kurushima Strait, a narrow passage known for its complex tidal currents and heavy maritime traffic. Visitors can observe the three distinct bridge segments that span the waterway to connect Oshima Island to the Shikoku mainland. The observation facility is integrated into the larger Itoyama Park complex, which serves as a trailhead for the Shimanami Kaido cycling route. The deck provides an elevated vantage point for monitoring the whirlpools created by the shifting tides in the strait below. The surrounding area functions as an information hub for the Seto Inland Sea region.
The highest tier of the wooden deck looking directly down the span of the first suspension bridge tower.
Bring binoculars to identify the various cargo ships navigating the narrow strait.
Combine your visit with a walk along the adjacent cycling paths for better angles of the bridge structure.
Check the tide charts before visiting to witness the visible whirlpools caused by the current.
Do not attempt to walk across the bridge deck from this specific point, as the access ramp is designed for cyclists and vehicles.
