Japan, Sydney, and Stockholm for naval museum visits

Of the countries visited in the previous five years, which offered the best museum experience outside the United States?

Japan for the overall standard encountered, with Sydney and Stockholm particularly strong as individual maritime or naval museum visits.

Dr. Clarke's comparison is based on museums visited during the preceding five years, with the United States excluded by the question. Japan stands out in his recollection for consistency across the museums visited. Sydney and Stockholm stand out as individual maritime or naval museum destinations. This is a personal comparison of those visits, without a named museum-by-museum assessment.