こんな歌を残している明治天皇の一面を知っている日本人は少ないのではないだろうか。 I think there are probably few Japanese who know this side of the Emperor Meiji, the side that left a song like this.
Kamui no Ken was a sort of samurai/ninja story set during the transition of the fall of the Tokugawa Shogunate and the re-establishment of Japan under the Emperor Meiji in 1868.