NHK morning drama "Tora ni Tsubasa" theme song, Kenshi Yonezu's "Sayonara, Mata Itsuka !" The vocal melody score is the length of the opening song of the drama.
The chord progression is also included.
In this sheet music, I use our own scale names so that you can recognize the chromatic scale of #&♭ (the black key part of the piano).
In addition to the usual do-re-mi-fa-sol-la-ti-do,
Do#, Re♭ → "Gu"
Re#, Mi♭ → "Yu"
F#, Sol♭ → "Ta"
So#, La♭ → "Za"
La#, Ti♭ → "Che".
These are based on various rationales such as ease of hearing, word sense, ease of saying, etc., and after various trials and errors, we finally settled on these five letters (as of April 2024) based on our comprehensive and original judgment.