Nagoya Ko to Onomichi Itozaki Sea Distance Calculator

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

Distance
337.1 nm
nautical miles
Under Sail
2.8 days
at 5 knots
Under Power
34 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: 337.1 nautical miles
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This map shows the direct sea route from Nagoya Ko to Onomichi Itozaki. 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 80% longer than the 187 nm direct line, its heading turning from southwest to northeast.

Sea distance
337.1 nm (624.3 km)
Direct line
187.1 nm80% longer
Great-circle bearing
258° (west-southwest)
Geographic extent
1.7° × 4.1°
Crossing
Domestic · Same region
From
Nagoya Ko (Japan) 35.0667, 136.8667
To
Onomichi Itozaki (Japan) 34.3833, 133.1667
Route basis
Sea-lane route
Passage timeEstimated passage time by cruising speed
Cruising speedDuration
5 kn2.8 days
8 kn42 hours
10 kn34 hours
12 kn28 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 Nagoya Ko to Onomichi Itozaki Route

The maritime route from Nagoya Ko to Onomichi-Itozaki is one of the popular sea connections in the East Asia region. This 337.101535098529 nautical mile journey typically takes 1.4 days – 2.8 days depending on your vessel type and weather conditions.

Nagoya Ko serves as a major port in Japan, while Onomichi-Itozaki 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 Nagoya Ko to Onomichi Itozaki by sea?

The sea distance from Nagoya Ko to Onomichi Itozaki is approximately 337.1 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 Nagoya Ko to Onomichi Itozaki?

For private vessels, sailing time depends on your cruising speed. At 10 knots, expect approximately 34 hours of sailing time.

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

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.

Plan another route with our Sea Distance CalculatorNavigation Guide