Watch Online Free FlixHQ. Hatsune Miku Symphony's 5th Anniversary Sound Source & Visualization! "Hatsune Miku Symphony" will be held for the 5th time this year at a concert where Vocaloid songs centered on Hatsune Miku will be performed in a luxurious full orchestra. The contents are all recorded in Pacifico Yokohama performance "Hatsune Miku Symphony 2020 ~ 5th Anniversary" on Saturday, October 17, 2020.