Osaka to Tokyo Sea Distance Calculator

Calculate the exact nautical distance from Osaka, Japan to Tokyo, Japan. Plan your maritime journey with our professional route calculator.

Distance
393.9 nm
nautical miles
Under Sail
3.3 days
at 5 knots
Under Power
39 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: 393.9 nautical miles
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This map shows the direct sea route from Osaka to Tokyo. 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 86% longer than the 212 nm direct line, its heading turning from west-southwest to northwest.

Sea distance
393.9 nm (729.6 km)
Direct line
211.9 nm86% longer
Great-circle bearing
73° (east-northeast)
Sea area
Pacific Ocean
Geographic extent
2.3° × 5.0°
Crossing
Domestic · Same region
From
Osaka (Japan) 34.6937, 135.5023
To
Tokyo (Japan) 35.6762, 139.6503
Route basis
Sea-lane route
Passage timeEstimated passage time by cruising speed
Cruising speedDuration
5 kn3.3 days
8 kn2.1 days
10 kn39 hours
12 kn33 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 Osaka to Tokyo Route

A medium ocean domestic sea route between Osaka and Tokyo, this passage connecting two major commercial ports in the Pacific region demands attention to eastern Pacific hurricane activity May through October in tropical latitudes.

The corridor within the same maritime region joins Osaka, Japan to Tokyo, Japan.

Navigation Tips

  • •Plan this medium ocean domestic leg in the Pacific region with attention to eastern Pacific hurricane activity May through October in tropical latitudes.
  • •Provisioning for this medium ocean passage in Pacific should account for regional supply networks.
  • •Allow time for entry formalities on this domestic leg within the same maritime region.
  • •Adapt safety equipment to Pacific conditions for this medium ocean crossing.
  • •For a domestic crossing within the same maritime region, ensure clearance papers and visas are in order before departure.

Frequently Asked Questions

How far is it from Osaka to Tokyo by sea?

This is a medium ocean sea passage of about 393.9 nautical miles between Osaka and Tokyo in Pacific.

How long does it take to sail from Osaka to Tokyo?

Average voyage time on this medium ocean within the same maritime region leg of 393.9 nautical miles is 1.6 days – 3.3 days.

What's the best time to sail from Osaka to Tokyo?

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