Tagonoura Ko to Yokkaichi — sea route & marine weather
The sea route from Tagonoura Ko (JPTGO) to Yokkaichi (JPYKK) is about 134 nm — about 13 hours at 10 kn. Along the route today (Aug 3): NE wind 14–26 kn, waves 2.4–4.0 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 134 nm |
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| Passage time at 10 kn | about 13 hours |
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| Great-circle distance | 102 nm |
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| Tagonoura Ko | 35°8.0′N 138°42.0′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 14–26 kn | 34 kn | 2.4–4.0 m |
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| NE 11–25 kn | 33 kn | 2.5–4.1 m |
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| ENE 9–22 kn | 31 kn | 2.8–3.6 m |
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| E 5–19 kn | 25 kn | 2.4–3.4 m |
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| SSE 6–18 kn | 24 kn | 2.2–3.0 m |
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| ESE 1–9 kn | 11 kn | 1.9–2.3 m |
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| NNE 2–11 kn | 13 kn | 1.6–2.2 m |
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| ENE 5–16 kn | 22 kn | 1.5–3.0 m |
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| S 2–3 kn | 13 kn | 1.2–1.8 m |
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| ENE 7–9 kn | 13 kn | 1.1–1.5 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 Tagonoura Ko to Yokkaichi by sea?
The water route is 134 nm (248 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Yokkaichi to Tagonoura Ko.
How long does the passage from Tagonoura Ko to Yokkaichi take?
about 13 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 Tagonoura Ko and Yokkaichi today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: NE wind 14–26 kn, waves 2.4–4.0 m. The day-by-day table on this page covers the next 10 days.