It is called "Golden Week".
But, I had to go to work at a preparatory school to teach two students. The most interesting thing is that whether a kind of companies so-called "Black companies" in Japan ensure holidays for employees. Watami is often used as an example of "Black companies".
So, I tried searching Google for "Watami Golden Week" in Japanese.
The result is shown below.
ワタミゴールデン posted by (C)gozami
See all of the four links.
"Miki Watanabe, the president of Watami, says"I'm going to spend Golden Week with my family"" are written.
But, employees are going to・・・.
You can imagine the following words.