Speaking of the 100 yen shop (Dollar shop) I dragged my kids in there yesterday afternoon. We found cute patterned packing tape, message cards, cellophane bags and stickers. Mee a Bee customers will really know their parcel has come from cute land when it arrives.
This is another thing to consider if you start your own business. I found Office Depot operates here but still the prices are a bit high and I haven't worked out the ordering system quite yet.