Anna R.
Google
This is the best supermarket I have found in Tokyo! Wide variety of chocolate and snacks - e.g. pack of 400 grams of (milk/dark) chocolate for sth around 1500 yen. Also, protein bars: Strong Bar (Strawberry flavour) for 300 - 400 yen is the best protein bar I have had in Japan. It is very healthy in comparison with other protein bars out there. And it is so hard to find!
Great store!