The Japanese Kanji and meaning for Kuyo (供養), apparently has no real direct equivalent in Chinese; I occasionally run across online questions from mainland Chinese exchange students in Japan asking what it means. The standard English translation, ‘memorial’, is worthless and does almost nothing to convey what Kuyo really is.
Kuyo is praying for the spirit of the deceased to be nourished by our earthly efforts so they attain enlightenment. In this way Kuyo is closer to the original ancient Indian Buddhist ceremonies and also elements of Vietnamese Buddhism which suggests that the culture traveled the southern trade routes to Japan.
In traditional Japanese Buddhism the 50th memorial year was the usual cutoff up through the Showa era, but these days the cutoff is the 33rd memorial since most of the people directly connected with the deceased aren’t around to do Kuyo for them, and it’s not the responsibility for later generations.
Japanese Buddhist practitioners say that forgetting is just as important in Kuyo as remembering. That sounds like a contradiction but it’s part of letting go of the past even as one honors it with Kuyo prayers; an important natural progression not only for the living, but also for the spirits of the deceased to leave past lives and become enlightened.
2020 marks the 75th anniversary of the end of the Pacific War. The annual Kuyo ceremony for all victims of the war and prayer for world peace was held on August 15 at the Chidorigafuchi National Cemetery. This years event was drastically scaled down because of COVID but I see it staying small as the number of people with direct connections with the war dwindles away.
When it disappears entirely I hope people will remember to forget, in the right way. I don’t believe that the people of the war generation wanted Kuyo to go on forever or burden future generations with the responsibility. They wanted them to be free from the past and lead happy lives, because that is the ultimate goal of Kuyo: happiness and enlightenment for all beings of the past, present and future.