For Hirokawa Maru - Bonegi 1 :
No gale warning.
The reliability of the situation is good.
Skies very cloudy to overcast in the morning, storms developing in the afternoon. Possibility of showers late in the morning, heavy showers in the afternoon. In the evening, storms as night falls.
Showers becoming less frequent. NE force 2 in the morning turning SSE force 1 in the evening. Gusts reaching 9 knots in the morning. Slight sea. Low, short swell from S. Poor visibility becoming good in the middle of the day then reduced by mist.