Onomichi Itozaki to Wakayama Shimotsu Ko Sea Distance Calculator

Calculate the exact nautical distance from Onomichi Itozaki, Japan to Wakayama Shimotsu Ko, Japan. Plan your maritime journey with our professional route calculator.

Distance
156.5 nm
nautical miles
Under Sail
31 hours
at 5 knots
Under Power
16 hours
at 10 knots
Best Time
Varies by area
Typical Sailing Season

Distance follows a sea-lane route. Sailing times are estimates at fixed cruising speeds and vary with vessel, weather, and currents.

Interactive Route Map

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Distance: 156.5 nautical miles
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This map shows the direct sea route from Onomichi Itozaki to Wakayama Shimotsu Ko. The actual sailing path may vary based on weather conditions and navigation requirements.

Passage details

This is a markedly indirect coastal passage: the navigable route runs 59% longer than the 98 nm direct line, its heading turning from southwest to south.

Sea distance
156.5 nm (289.8 km)
Direct line
98.2 nm59% longer
Great-circle bearing
96° (east)
Geographic extent
0.3° × 2.2°
Crossing
Domestic · Same region
From
Onomichi Itozaki (Japan) 34.3833, 133.1667
To
Wakayama Shimotsu Ko (Japan) 34.2000, 135.1333
Route basis
Sea-lane route
Passage timeEstimated passage time by cruising speed
Cruising speedDuration
5 kn31 hours
8 kn20 hours
10 kn16 hours
12 kn13 hours

Distance follows a sea-lane route generated from marine traffic lanes; passage times are computed at fixed cruising speeds.

Read the methodology — How we calculate sea distances

Last reviewed 2026-06-17

About Onomichi Itozaki to Wakayama Shimotsu Ko Route

The maritime route from Onomichi-Itozaki to Wakayama-Shimotsu Ko is one of the popular sea connections in the East Asia region. This 156.4737350652908 nautical mile journey typically takes 16 hours – 31 hours depending on your vessel type and weather conditions.

Onomichi-Itozaki serves as a major port in Japan, while Wakayama-Shimotsu Ko is an important major destination in Japan. Both ports offer excellent facilities for recreational and commercial vessels.

Navigation Tips

  • •Check weather forecasts before departure, especially during winter months
  • •Consider fuel stops for longer journeys - calculate consumption using our tool
  • •Verify port entry requirements and operating hours at both destinations
  • •Account for seasonal variations in sea conditions and daylight hours
  • •Keep updated nautical charts and follow established shipping lanes

Frequently Asked Questions

How far is it from Onomichi Itozaki to Wakayama Shimotsu Ko by sea?

The sea distance from Onomichi Itozaki to Wakayama Shimotsu Ko is approximately 156.5 nautical miles. The exact distance may vary slightly depending on your specific route and any waypoints you include.

How long does it take to sail from Onomichi Itozaki to Wakayama Shimotsu Ko?

For private vessels, sailing time depends on your cruising speed. At 10 knots, expect approximately 16 hours of sailing time.

What's the best time to sail from Onomichi Itozaki to Wakayama Shimotsu Ko?

Conditions on this route vary by area and season, so there is no single best time that applies along its whole length. Always check current weather forecasts and sea conditions before departure.

Plan Your Perfect Maritime Journey

Use our advanced calculator above to customize your route, add waypoints, calculate fuel costs, and share your journey plan with crew members.

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