My friends Jon and David live up in Tochigi, two hours north of Tokyo by train. I went up for a weekend visit, and some other friends drove down from Akita. We went to Nikko for the day. As I recall, a Japanese emperor by the name of Tokugawa (one of several), declared that upon his death he would become a god, and his successor should build a city to honor him. His successor agreed, and that city is Nikko.