What festival is Kaiyang?

Every year when cherry blossoms are in full bloom, some tribes in Japan celebrate Kaiyang Festival. On that day, several strong young men will March in the city with huge and lifelike male sexual organs carved from wood, which is unprecedented. Many women are eager to touch the penis and are proud of it. Japanese girls also have the custom of bathing as adults. On the day of adulthood, girls must take a bath with a man at home and scrub each other. Of course, there can't be sexual intercourse, just taking a shower. Japan is really a strange country.