Japanese hospitality is noteworthy. Whatever the restaurant you enter, you’ll not wait more than one minute before being served.
Most often, they’ll bring you a glass of water, green tea or bancha (see the article about tea).
And at the same time, they also bring you a humid towel called o-tefuki (お手拭, literally: “wipe-hand”) which, besides wiping one’s hand as the name indicates it, can also be used to refresh one’s face. Usually, the tefuki is hot in the winter and cold in the summer, which I find very nice.