Earlier quoted context omitted.
I wonder. Japan also has 16 national holidays in comparison with (for example) the US's 11.
The importance of that really depends on who observes holidays. There is no legal incentive for US employers to observe any. I don't know where your eleven come from, but that sounds like the Federal Government's number for its employees. Private employers typically observe 4-8, including Christmas.
On the bright side, I'm a shift worker, so I get to take holidays whenever I want, no questions asked. It's bundled in with my PTO, except it doesn't roll over if I don't use it. As a result, your first seven days of PTO are "holidays."