17-Night Cruise on Diamond PrincessGrand Circle Japan - Weather

Departing Yokohama, Japan on September 5, 2026, the Princess Cruises ship Diamond Princess runs this 17-night Grand Circle Japan sailing. It's a classic Asia cruise. Travelers sailing in September can generally expect cooler, off-season conditions. Ports of call include Yokohama, Japan, Hakodate, Japan, Niigata, Japan, with 11 more along the way. Scroll the daily outlook below to pack smart for every port of call.

1. Day 1 — Saturday, Sep 5, 2026 — Yokohama, Japan

   Yokohama, Japan is a scheduled port of call on day 1 of the 17-night Grand Circle Japan cruise on Diamond Princess.

2. Day 2 — Sunday, Sep 6, 2026 — At Sea

   Day 2 of 18 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Circle Japan itinerary.

3. Day 3 — Monday, Sep 7, 2026 — Hakodate, Japan

   Hakodate, Japan is a scheduled port of call on day 3 of the 17-night Grand Circle Japan cruise on Diamond Princess.

4. Day 4 — Tuesday, Sep 8, 2026 — Niigata, Japan

   Niigata, Japan is a scheduled port of call on day 4 of the 17-night Grand Circle Japan cruise on Diamond Princess.

5. Day 5 — Wednesday, Sep 9, 2026 — At Sea

   Day 5 of 18 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Circle Japan itinerary.

6. Day 6 — Thursday, Sep 10, 2026 — Busan, South Korea

   Busan, South Korea is a scheduled port of call on day 6 of the 17-night Grand Circle Japan cruise on Diamond Princess.

7. Day 7 — Friday, Sep 11, 2026 — Nagasaki, Japan

   Nagasaki, Japan is a scheduled port of call on day 7 of the 17-night Grand Circle Japan cruise on Diamond Princess.

8. Day 8 — Saturday, Sep 12, 2026 — Kagoshima, Japan

   Kagoshima, Japan is a scheduled port of call on day 8 of the 17-night Grand Circle Japan cruise on Diamond Princess.

9. Day 9 — Sunday, Sep 13, 2026 — Kochi, Japan

   Kochi, Japan is a scheduled port of call on day 9 of the 17-night Grand Circle Japan cruise on Diamond Princess.

10. Day 10 — Monday, Sep 14, 2026 — Shimizu, Japan

    Shimizu, Japan is a scheduled port of call on day 10 of the 17-night Grand Circle Japan cruise on Diamond Princess.

11. Day 11 — Tuesday, Sep 15, 2026 — Yokohama, Japan

    Yokohama, Japan is a scheduled port of call on day 11 of the 17-night Grand Circle Japan cruise on Diamond Princess.

12. Day 12 — Wednesday, Sep 16, 2026 — At Sea

    Day 12 of 18 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Circle Japan itinerary.

13. Day 13 — Thursday, Sep 17, 2026 — Nagasaki, Japan

    Nagasaki, Japan is a scheduled port of call on day 13 of the 17-night Grand Circle Japan cruise on Diamond Princess.

14. Day 14 — Friday, Sep 18, 2026 — Busan, South Korea

    Busan, South Korea is a scheduled port of call on day 14 of the 17-night Grand Circle Japan cruise on Diamond Princess.

15. Day 15 — Saturday, Sep 19, 2026 — At Sea

    Day 15 of 18 is a day at sea aboard Diamond Princess, cruising between ports on the Grand Circle Japan itinerary.

16. Day 16 — Sunday, Sep 20, 2026 — Kochi, Japan

    Kochi, Japan is a scheduled port of call on day 16 of the 17-night Grand Circle Japan cruise on Diamond Princess.

17. Day 17 — Monday, Sep 21, 2026 — Shimizu, Japan

    Shimizu, Japan is a scheduled port of call on day 17 of the 17-night Grand Circle Japan cruise on Diamond Princess.

18. Day 18 — Tuesday, Sep 22, 2026 — Yokohama, Japan

    Yokohama, Japan is a scheduled port of call on day 18 of the 17-night Grand Circle Japan cruise on Diamond Princess.