Food for thought
Steph in Saitama writes: "I like Japanese food a lot, but every now and then I get a craving for goodies that are nowhere to be found in my area. I could ask my mom to send a care package, but I'd feel silly asking her to send an emergency supply of Reese's Peanut Butter Cups. Any suggestions?"
If you can't find what you're looking for at the National Azabu in Hiroo, you might try Meidi-ya, which has six stores in Tokyo (including Hiroo and Roppongi), Nissin World Delicatessen (located in Azabu Juban, near Roppongi), or Kinokuniya, which has five stores in Tokyo, the largest in Aoyama, near Omotesando station.
Some of the major hub stations on the Yamanote line -- Ueno and Shinagawa, for example -- have small markets that sell foreign food. There is also an American Pharmacy in Ueno Station and near Tokyo Station on the Marunouchi where you can buy imported candy (though not Reese's).