In Japan, we have Large Consecutive Holiday called Golden Week, which is a Japanese term applied to the period containing the following public holidays:
April 29 is Showa day, formally known as the Showa Emperor’s Birthday, then Greenery Day.
May 3 is Constitution Memorial Day
May 4 is Greenery Day
May 5 is Children’s Day
Many Japanese take paid vacation on the between holidays, or some companies completely close and give their employees off. So Golden Week is the longest vacation period of the year for many Japanese now a day.
Therefore, Golden Week is the most crowded week in Japan because many Japanese are traveling to famous destinations.