Netsuke  are miniature sculptures that were invented in 17th century Japan to serve a practical
function (the two Japanese characters ne+tsuke mean "root" and "to attach"). Traditional Japanese
garment—robes called kosode and kimono—had no pockets, however men who wore them needed a
place to store their personal belongings such as pipes, tobacco, money, seals, or medicines. (from
wikipedia)

Today netsuke refer to the charms that hang off of cellular phones.  The Hello Kitty ones usually
represent a trend, prefecture or person in Japan.
Devil Charm
Maid Charm: In Japan "Maid Cafe's" are very
popular.  The servers dress up as maids (both men
and women).
Space Invaders
Charm
Mentaiko Charm: Mentaiko is a common
ingredient in Japanese cooking.  Check out
this YouTube clip that advertises a particular
brand "Tarako."
Oze Charm
Wasabi Charm
Gloomy Bear x Hello Kitty
Hello Kitty meets
To-Fu Oyako