The long-term distributions used for estimation of return values are a Fisher Tipprt Type I distribution and a Weibul distribution of 3parameters.

West area off the Tsugaru Straits  Return period R and maximum significant wave height  Return period R and maximum mean wind speed  Estimated maximum value during years Return period R H [m] Vw [m/s] 10 years 8.1 26.3 20 years 8.6 27.5 30 years 8.9 28.3 100 years 9.7 30.6  Area of the Izu Islands  Return period R and maximum significant wave height  Return period R and maximum mean wind speed  Estimated maximum value during years Return period R H [m] Vw [m/s] 10 years 12.9 30.6 20 years 14.5 32.0 30 years 15.3 32.9 100 years 17.9 35.3

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