The plum blossom is like the poor cousin of the cherry blossom in Japan. It just doesn't get the attention it deserves, even though it is a lovely flower. Yushima Tenjin in Tokyo has a festival for them in February to March every and is well worth seeing.
Design Festa is the biggest art show in Asia and it isn't only about art as it has live music, arts and crafts, cosplay and so much more. See a few pics from the 2016 great event here on Tokyo in Pics.