It is the custom for Japanese to take off their shoes in the entrance hall when they enter a home. However, when we go abroad, we often experience culture shock. For example, one of my friends went to New Zealand to study English. She knew that abroad people do not take off their shoes when they enter a home and that leaving their shoes on is part of their lifestyle, so she followed that custom when she went to New Zealand. After a couple of weeks, however, she grew tired of wearing shoes inside and she decided to go to buy some slippers. In Japan, it is easy to buy slippers for inside use, but in New Zealand, it was very difficult for her to find a store that sold slippers. I would like to reexamine this Japanese custom and introduce it to foreigners who may not be familiar with it.