Before 1907 Japanese postal law didn't allow a message on the same side of a post card as the address. People were forced to write on the image.
Here is a New Years card sent in 1905 to an American friend.
People stopped sending battle ships for new years some time ago.
New Year’s cards themselves are now dwindling. Line messages prosper. I still send. Today I will decide 2020’s design. Shall I go with the year of the rat? Or Icarus?