Senri Kawaguchi (in the pink shirt) is a 13-year-old junior high school student. But that's not all.
She's also a drumming whiz. She's been drumming since she was a kid (I know, she's still a kid), and most of her vids on her site are of her doing the drumming parts for songs from schoolgirl rocker anime K-On!! and K-On!. She got into the anime last summer.
But before you think she's some kind of one trick pony, check out her drumming jazz standard Night In Tunisia at a Shibuya club. She's a talented drummer!
SEGA has recently revealed that it is working on a K-On! video game.