There is another poem which consciously imitated the 608th poem of the Manyoshu: Love for the person who doesn't care for me is more in vain than writing numbers on flowing water (Anonymous, No. 522, Love First, Kokin Wakashu [A Collection of Ancient and Modern Japanese Poetry]).
608番歌を本歌取りしたものに、行く水に数書くよりもはかなきは思はぬ人を思ふなりけり（よみ人知らず、古今和歌集恋一、522）がある。