Enka song mentioned by the grandpa/docter, not blue light Yokohama

I thought I posted this already but couldn’t find my post anymore, anyway I liked the movie!

Question, during the scene right before they play ‘Blue light yokohama’ they mention that the grandpa goes to Karaoke to sing Enka songs, they mention a title, translated as ‘plejaden’ in the Dutch subtitles. I can’t find any similar song on youtube but I am curious about the song the grandpa sings supposently. Thanks!