I feel like i am adult when I graduated high school. Wearing uniform, obeying school strict rule were for people who are not mature. Of course in Japan, we become adults when we are 20 year old, however, even people who are university students can act and think individualy. yeah they should. When I was in England and I was 17 years old, I was told by my host mum that you're already an adult. At that time I really felt like "what a stupid girl am I..." Almost of Japanese teenagers are too childish I guess. This might be prejudice though. I don't like people going somewhere always with friends or someone and people who can't act on their own. I just wanna say to them, "Do what you want to do." ;(