Tokyo to Mikawa Sea Distance Calculator

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

Distance
238.7 nm
nautical miles
Under Sail
48 hours
at 5 knots
Under Power
24 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: 238.7 nautical miles
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This map shows the direct sea route from Tokyo to Mikawa. 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 85% longer than the 129 nm direct line, its heading turning from southeast to south-southeast. It spans two maritime regions.

Sea distance
238.7 nm (442.1 km)
Direct line
128.9 nm85% longer
Great-circle bearing
244° (west-southwest)
Geographic extent
1.2° × 3.0°
Crossing
Domestic · Cross-region
From
Tokyo (Japan) 35.6762, 139.6503
To
Mikawa (Japan) 34.7167, 137.3000
Route basis
Sea-lane route
Passage timeEstimated passage time by cruising speed
Cruising speedDuration
5 kn48 hours
8 kn30 hours
10 kn24 hours
12 kn20 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 Tokyo to Mikawa Route

The maritime route from Tokyo to Mikawa is a overnight offshore within one country passage between two major harbours in the Pacific region. Mariners on this leg typically prepare for the western Pacific typhoon season July through October.

This route runs crossing between different maritime regions, connecting Tokyo in Japan with Mikawa in Japan.

Navigation Tips

  • •On this overnight offshore within one country crossing in the Pacific region, prepare for the western Pacific typhoon season July through October, particularly in peak season.
  • •For a overnight offshore route, plan fuel and provisioning around the Pacific region — calculate consumption with our tool.
  • •Verify port-entry requirements at both ends of this within one country route crossing between different maritime regions before you depart.
  • •Check safety gear suited to Pacific conditions before a overnight offshore passage — life rafts, EPIRB, and current charts.
  • •Carry passports, vessel documents, and crew lists matched to this within one country route crossing between different maritime regions.

Frequently Asked Questions

How far is it from Tokyo to Mikawa by sea?

The sea distance from Tokyo to Mikawa is approximately 238.7 nautical miles — a overnight offshore passage in Pacific.

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

A overnight offshore crossing between different maritime regions crossing of 238.7 nautical miles typically takes 24 hours – 48 hours, depending on vessel and weather.

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

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