Japan has a tradition of celebrating longevity, but the longest celebration is the 60th birthday. One of them is “Hyakuju celebration”, also called “Hyakuju” or “Momoju”. As the character suggests, the 100th anniversary is a celebration for those who have reached the age of 100. However, the year of 100 = 1 century is sometimes referred to as “Kiju”. And it is officially held at the age of 100 in a number of years, but it seems that it is often done at full age instead of a number of years.
Now, let me explain what a celebration is like a 100th birthday celebration. Chanchanko, hats, hoods, etc. are often prepared as longevity celebration items, but there are colors that are decided for each celebration. For example, there are various theories for “Red” for the 60th birthday, and for the celebration of the 100th anniversary, but it is used as a color that honors the elderly, such as white and gold. Also, since the word “hundred” can be called “Momo”, it seems that there are many “Pink” celebration items.