Wakayama-Shimotsu Ko to Yokkaichi — sea route & marine weather
The sea route from Wakayama-Shimotsu Ko (JPWAK) to Yokkaichi (JPYKK) is about 208 nm — about 21 hours at 10 kn. Along the route today (Aug 3): NE wind 1–18 kn, waves 0.2–2.5 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 208 nm |
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| Passage time at 10 kn | about 21 hours |
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| Great-circle distance | 87 nm |
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| Wakayama-Shimotsu Ko | 34°12.0′N 135°8.0′E |
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| Yokkaichi | 34°58.0′N 136°38.0′E |
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| Reference vessel | 4.5 m draft, 10 kn cruise |
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10-day marine forecast — along the route
| Date | Wind | Gusts | Waves |
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| NE 1–18 kn | 21 kn | 0.2–2.5 m |
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| SSE 3–17 kn | 21 kn | 0.2–3.0 m |
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| E 1–20 kn | 25 kn | 0.3–3.4 m |
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| ENE 9–19 kn | 25 kn | 0.6–3.4 m |
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| SE 5–18 kn | 24 kn | 0.8–3.0 m |
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| SE 6–11 kn | 13 kn | 0.6–2.3 m |
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| ENE 2–5 kn | 6 kn | 0.4–1.8 m |
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| SSE 3–5 kn | 11 kn | 0.3–1.5 m |
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| S 2–7 kn | 19 kn | 0.5–1.2 m |
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| SE 7–7 kn | 17 kn | 0.4–1.1 m |
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Forecast from the ECMWF IFS model run , waves from ECMWF WAM. Updated with each model cycle; the live chart below recalculates for your departure time and vessel.
Frequently asked
How far is it from Wakayama-Shimotsu Ko to Yokkaichi by sea?
The water route is 208 nm (385 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Yokkaichi to Wakayama-Shimotsu Ko.
How long does the passage from Wakayama-Shimotsu Ko to Yokkaichi take?
about 21 hours at a 10 kn cruise. Scale by your own speed: at half the speed it takes about twice as long. The planner on this page recalculates for your vessel and live weather.
What is the weather between Wakayama-Shimotsu Ko and Yokkaichi today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: NE wind 1–18 kn, waves 0.2–2.5 m. The day-by-day table on this page covers the next 10 days.