The sixth installment in Crypton Future Media's annual Hatsune Miku Symphony concert series, this live concert event was held in Yokohama and Kobe respectively in autumn 2021. Hence the subtitle, KAITO's fifteenth anniversary was commemorated at this event. The main visual was illustrated by Rella, and the event's official theme song is entitled "Kaijin", written and composed by DioSignal. Featuring: Hatsune Miku, KAITO, MEIKO, Megurine Luka, Kagamine Rin, and Kagamine Len Accompanied by: Tokyo Philharmonic Orchestra (Yokohama), Osaka Philharmonic Orchestra (Kobe), Hirofumi Kurita (conductor)

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