Japanese festivals are traditional festive occasions. Some festivals have their roots in Chinese festivals but have undergone dramatic changes as they mixed with local customs.
Some are so different that they do not even remotely resemble the original festival despite sharing the same name and date. There are also various local festivals (e.g. Tobata Gion) that are mostly unknown outside a given prefecture. It is commonly said that you will always find a festival somewhere in Japan.
Unlike most people in East Asia, Japanese people generally do not celebrate Chinese New Year (it having been supplanted by the Western New Year's Day in the late 19th century); although Chinese residents in Japan still do. In Yokohama Chinatown, Japan's biggest Chinatown, tourists from all over Japan come to enjoy the festival. And similarly the Nagasaki Lantern Festival is based in Nagasaki's Chinatown.