Samurai Equine

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TOKUSATSU MUSIC HIGHLIGHT:
"月の満ちる時" (Tsuki No Michiru Toki, "When The Moon Is Full") by Shieri Ohata ft. Kamen Rider Girls.

What an end to an era! 
Kamen Rider Zi-O was an anniversary series AND the end of the Heisei Era. Not many bonus songs were made for this show, but here's one of them. It's basically Tsukuyomi's theme song, a character who later becomes a Kamen Rider and ally to the main heroes of the show. Yes, I know the melody has a slight middle-eastern inspiration at times. It's just what they felt like doing in the show. Don't read too deep into it. Nothing more than a stylistic choice.