I was just wondering what teenagers in Japan think is cool today?
Their own TV stars and pop music artists, fashion trends, basically the same thing as in the U.S.
Like, what do teenagers like to do for fun or in their free time?
Karaoke, arcade gaming, hanging out with friends.
What do teenagers think is "hot"?
Most likely similar to the U.S.
What do teenagers want to buy or can't live without, besides food and water
?
A mobile phone.
Oh and just for fun, what do Japanese teenagers think of America and the English language?
No one cares, like the majority of the kids in your country doesn't care about things happening outside of their own social life. Do you really think Japanese high school kids caring about some Texan dullard (read: Pres. Bush) ? Do you really think American high school kids caring about some Japanese dude with funky hairdo (read: PM Koizumi)? Same thing.