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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…The Diamond Princess sails a 18-night Grand Japan with Okinawa & Taiwan itinerary with Princess Cruises, departing Yokohama, Japan on September 22, 2026. It's a classic Asia cruise. Travelers sailing in September can generally expect cooler, off-season conditions. Ports of call include Yokohama, Japan, Keelung, Taiwan, Ishigaki, Japan, with 9 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.
Yokohama, Japan is a scheduled port of call on day 1 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 78°F.
Keelung, Taiwan is a scheduled port of call on day 2 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 80°F.
Ishigaki, Japan is a scheduled port of call on day 3 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 83°F.
Naha, Japan is a scheduled port of call on day 4 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 82°F.
Yokohama, Japan is a scheduled port of call on day 5 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 75°F.
Toba, Japan is a scheduled port of call on day 6 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 76°F.
Kobe/Osaka, Japan is a scheduled port of call on day 7 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 77°F.
Kochi, Japan is a scheduled port of call on day 8 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 78°F.
Hiroshima, Japan is a scheduled port of call on day 9 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 78°F.
Busan, South Korea is a scheduled port of call on day 10 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 69°F.
Nagasaki, Japan is a scheduled port of call on day 11 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 79°F.
Yokohama, Japan is a scheduled port of call on day 12 of the 18-night Grand Japan with Okinawa & Taiwan cruise on Diamond Princess. Expected weather: partially cloudy with highs near 73°F.
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