Oh yes. I went to high school in Japan. There the quote is "four hours pass", "five hours fail" and they are talking about hours of sleep! All the rest, just about, is study.
That said, I do resent this attitude that Japanese/Chinese students end up with no soft skills. These are countries with a huge emphasis on personal and family relationships. In Japanese high schools, it is compulsory to be in a club and there is a huge range to choose from - brass band, volleyball, karate, etc. People do put real time and commitment into their clubs, it is not all study. They also clean the school themselves! It is all so different.
Likewise, your class is a real social grouping which is hugely important. Every sports day each class would prepare a marching routine, and a class themed costume event (planning and making all costumes, etc).
It does not look like a western teenage life but neither is it incomplete - social, sporting, artistic needs are met in different ways.
Also there is less emphasis here on a body of knowledge that all must have. If you go to school in Japan there is a list of Japanese and Chinese classics you must read and understand - at every school level. I am constantly baffled by how little emphasis there is on the western canon, for example. I read to my children every day, but had not made a concerted effort to cover every essential text. Then I realised my oldest child was eight and did not know who Rumpelstiltskin and Rapunzel were. I suddenly realised that if I did not have a check list of what I thought my children should read/hear read to them, no-one else would. I recently had a conversation with a French friend schooling her children in London who had made the same realisation - she felt in France, too, there would have been more made of ensuring all vital texts were covered.
I am not saying that Asia is better. I actually value huge amounts of the British schooling system. My children are doing well. The Japanese teenage suicide rate is not something to envy.
More I am saying that without looking at the whole cultural situation it is difficult to make comparisons.