Part of the cemetery I explored in Victoria was built to honor the Japanese Canadians who died during the early part of the twentieth century. Many of the tombstones looked new, although the deceased had been dead for almost a century. So I think the graves were made long after their deaths, in effort to right some previous wrong.
Many of the tombs were for children or infants. I have never seen so many infant graves. Their tombstones were engraved with the image of a cherry blossom, and in a poetic gesture of symbolism, actual cherry blossom petals had fallen on their graves.