How long is cram school for high school students in japan on average?

Question:

I'm not sure if you would call it high school, but let's just say how long do Japanese teenagers study at cram schools.
I read on wikipedia something about 4 hours or more, but they did not specify age and 4 hours is a lot, so I'd rather hear from someone who went/goes to school there.
And thanks very much for answering, I'm interested.

Answer:

Actually, this data shows that they at 2nd year of high school go to cram school for 9.1 minutes on average. But this is including those who are not going at all.
http://benesse.jp/berd/center/open/repor…

If you take average only on those who are going, it's 48.3 minutes according to this data.

But things are not so simple. Kids study more at 3rd year of high school because many of them need to study for college entrance exams. Actually, this data shows that the hour is higher at 3rd year of junior high school.

So it depends on which grade you are talking about.


4 hours is far from reality.