Teenage Fashion?

I am a 16 year old girl, going to Japan for the summer, and I want to know what is considered acceptable clothing for teenagers.

what length shorts are too short? Do girls wear skirts everyday? And is it weird for a girl to wear Converse lowtops? Any other advice?

Thanks,
Nicky

Anything is alright while it's appropriate to wear at your age.
Refer something like these.
http://coordisnap.com/mode/list/index/%E9%AB%98%E6%A0%A1%E7%94%9F?page...

Pretty much anything is okay if you're a teenager. Except for tattoos and piercings which are taboo here and will make it hard to get into onsens if you want to do that. Are you coming as a tourist or will you stay with a host family? If you're a tourist then anything is fine. If you're staying with a host family they might want you to dress conservatively for special events (no clevage, no visible tattoos, no short skirts, no 'showy' clothes or sleeveless tops) but for casual everyday wear what you said sounds fine. Shorts and short skirts are fine as long as they aren't super short eg: show your underwear when you bend over, Converse are fine, dresses/skirts are very popular but it's fine to wear jeans/pants too. As a teenager you could get away with some piercings if you're willing to take them out for special events.

Schoolwear and casual wear are two different things. The former may have regulations or some sort of guideline. You need to check with your school if you're doing student exchange. Ear-piercing is acceptable in many schools, too.

For after-school, anything is fine, except that Japanese teenagers who wear short pants are quite fashion-conscious. In other words, girls either don't care and wear long pants, or they care a lot and wear short pants but in a really stylish way. You don't wear beach-wear in the middle of the city.

Here are some photos you can refer to.

Converse:
https://www.google.co.jp/search?q=%E3%82%B3%E3%83%B3%E3%83%90%E3%83%BC...

Real short pants:
https://www.google.co.jp/search?q=%E3%82%B7%E3%83%A7%E3%83%BC%E3%83%88...