Anime! Try Full metal Alchemist or Naruto or Bleach. Maybe even Higurashi no naku koro ni!!
Since this is under food, I'm assuming you mean food-wise. Like in most places, children eat what they were raised on, and like most of the things their parents make, which would be a rice-staple diet with fish as the most common thing to go with it. Treats are mainly sweet or salty. Buns with sweet filling, mochi, and imported goods like chocolate seem to be common. Then there are fried sesame goods and packets of salty crunchy food. I'm not really sure about what's popular among teenagers in particular, though. Sorry.
They can't drink until they're twenty, though. I'm pretty sure that Sapporo beer and other strong drinks are popular.
Party.
LILI
People have varing souls, no one can fit into one group! It all depends on the person.
A person might like any colour from the whole spectrum. Teenagers are no different.
The same a teenagers anywhere in the world.
Teenagers do whatever they feel like doing depending on their interests and moods.
In 2009 there are 27% of teenagers expirimented with drugs.
texting
football
nothing
Teenagers may like to play Monopoly, Scrabble, Life, Jenga, Scattegories, etc. This will be dependent on your teenager. Some teenagers do not like to play board games.
teenagers like the kind of the language they can understand with less speaking ability and more descriptive