I think Japanese school year isn't too long because for me, school is a kind of comfortable place to have fun as there are a lot of friends too.
So actually, I want more time in school so I don't agree with your idea.
I understand your saying that "students should enjoy more holiday time." but schools also give students lots of fun.
In my opinion,
for Japanese people, we need to understand how to cope with other people in order to avoid collision. It's a kind of Japanese custom, as you know.
In school, we become to understand such a Japanese harmony thing by spending more time together.
That's a system in Japan, I think.
Of course, I personally feel like that. I need more time to learn the Japanese style relationship.
When I was Juniorhigh and High school student,
I had thought "ah,everyday Why should I go to the school?
too much!! Want to trip somewhere!! "
Because hate studying and waking up early morning
;belonged basketball-society.
and now,
I think "Certainly,the schooldays are long,
Sometimes it can become a source of STRESS.
But at the same time, it also can a chance of BRUSH MYSELF or
UP MOTIVATION by meeting people.
So the long schooldays is very important for me."