Kōreisai is a special Japanese festival that is celebrated to honor the lives of old people. It's like a big party that people throw to say, "Thank you for being alive for so long!"
At kōreisai, people often offer food, drinks, and gifts to the elderly who attend. There are also lots of fun activities like singing, dancing, and playing games.
Kōreisai is a very important tradition in Japan because respecting and celebrating elderly people is a big part of their culture. By showing love and appreciation for the elderly, people hope to create a society that values all ages and stages of life.