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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Join Princess Cruises's Diamond Princess for a 20-night voyage on the Grand Japan route, setting out from Yokohama, Japan on August 26, 2026. It's a classic Asia cruise. Travelers sailing in August can generally expect cooler, off-season conditions. Ports of call include Yokohama, Japan, Toba, Japan, Kobe/Osaka, Japan, with 14 more along the way. The forecasts below break the weather down port by port.
Yokohama, Japan is a scheduled port of call on day 1 of the 20-night Grand Japan cruise on Diamond Princess.
Toba, Japan is a scheduled port of call on day 2 of the 20-night Grand Japan cruise on Diamond Princess.
Kobe/Osaka, Japan is a scheduled port of call on day 3 of the 20-night Grand Japan cruise on Diamond Princess.
Kochi, Japan is a scheduled port of call on day 4 of the 20-night Grand Japan cruise on Diamond Princess.
Hiroshima, Japan is a scheduled port of call on day 5 of the 20-night Grand Japan cruise on Diamond Princess.
Day 6 of 21 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Japan itinerary.
Busan, South Korea is a scheduled port of call on day 7 of the 20-night Grand Japan cruise on Diamond Princess.
Nagasaki, Japan is a scheduled port of call on day 8 of the 20-night Grand Japan cruise on Diamond Princess.
Day 9 of 21 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Japan itinerary.
Shimizu, Japan is a scheduled port of call on day 10 of the 20-night Grand Japan cruise on Diamond Princess.
Yokohama, Japan is a scheduled port of call on day 11 of the 20-night Grand Japan cruise on Diamond Princess.
Day 12 of 21 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Japan itinerary.
Hakodate, Japan is a scheduled port of call on day 13 of the 20-night Grand Japan cruise on Diamond Princess.
Niigata, Japan is a scheduled port of call on day 14 of the 20-night Grand Japan cruise on Diamond Princess.
Day 15 of 21 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Japan itinerary.
Busan, South Korea is a scheduled port of call on day 16 of the 20-night Grand Japan cruise on Diamond Princess.
Nagasaki, Japan is a scheduled port of call on day 17 of the 20-night Grand Japan cruise on Diamond Princess.
Kagoshima, Japan is a scheduled port of call on day 18 of the 20-night Grand Japan cruise on Diamond Princess.
Kochi, Japan is a scheduled port of call on day 19 of the 20-night Grand Japan cruise on Diamond Princess.
Shimizu, Japan is a scheduled port of call on day 20 of the 20-night Grand Japan cruise on Diamond Princess.
Yokohama, Japan is a scheduled port of call on day 21 of the 20-night Grand Japan cruise on Diamond Princess.
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