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Tsunoshima Bridge — 1.7km Over Emerald Sea

Published: Jul 22, 2026

Updated: Jul 22, 2026

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Tsunoshima Bridge — 1.7km Over Emerald Sea

Tsunoshima Bridge (角島大橋) is a 1,780-meter toll-free bridge connecting Honshu to tiny Tsunoshima Island, arcing over water so vividly turquoise it resembles Okinawa more than the Sea of Japan. Completed in 2000, the bridge intentionally curves rather than running straight, creating a graceful S-shape that photographers have immortalized in countless car commercials, tourism campaigns, and Instagram posts. The approach from the mainland offers an elevated vantage where the white bridge seemingly floats over graduated blue-to-green shallows.

The bridge's beauty is functional as well as aesthetic — the gentle curve reduces wind impact and allows drivers to appreciate the seascape rather than mindlessly speeding across. The island itself (population 900) hosts a lighthouse, small beaches, and seafood restaurants, but most visitors come for the bridge itself. Driving across at 50 km/h takes three minutes; the memory lasts decades. The water color peaks in summer (July–August) when sun angle and water clarity combine for maximum brilliance, though autumn (October) offers clearer skies and fewer crowds.

Essential Information

Opening Hours

Bridge accessible 24/7. Tsunoshima Lighthouse 9:00–17:00.

Closed: Open year-round

Entrance Fee

Bridge toll free. Lighthouse ¥300.

Best Season

July–August for most vivid turquoise water; May and October for clearer visibility and fewer crowds

Visit Duration

1–2 hours including mainland viewpoint, bridge crossing, lighthouse visit, and seaside lunch

Getting There

Access Information

Tsunoshima, Shimonoseki. 60 min drive from Shimonoseki Station or 40 min from Nagato. No public transit — rental car essential. Free parking on mainland viewing point (Tsunoshima Ohashi Park). Bridge toll: free. Island has small cafes and lighthouse (¥300 entry).

Insider Guide

Premium

**Optimal viewing point:** Don't just drive across — stop at Tsunoshima Ohashi Park on the mainland side before the bridge. This elevated viewing area provides the iconic panorama of the bridge's S-curve over turquoise shallows. Arrive mid-morning (10:00–11:00) when sun illuminates the water from the east, maximizing color saturation. Sunset (18:00–19:00 in summer) creates golden-hour glow but water appears darker. **Driving experience:** Once photographed from the park, drive across slowly (50 km/h limit is enforced). The roadway sits low to the water — at high tide, you feel like you're skimming the sea surface. Windows down, stop at the island-side parking (free) and walk to the beach. The water clarity allows seeing 5–10 meters down to sand and rock. **Weather dependency:** Water color is dramatically weather-dependent. Sunny days are essential — overcast skies turn the water dull gray. Summer (July–August) offers the most intense turquoise but also brings crowds and heat. Spring (May) and autumn (October) have clearer visibility and comfortable temperatures, though water color is slightly less vivid. **Tsunoshima Island add-ons:** If spending 2+ hours, visit Tsunoshima Lighthouse (角島灯台, ¥300, 105 steps to top) for 360° sea views, and Shiokaze no Sato restaurant (しおかぜの里) for uni don (sea urchin rice bowl, ¥2,000–3,500) using locally harvested uni — available May–August.

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