Yoshinari did key animation for Gainax and later for Trigger, as well as other animation studios such as; Neon Genesis Evangelion, Dead Leaves, FLCL, Panty and Stocking with Garterbelt, etc. He also did mechanical designs and animation for Gurren Lagann, and TTGL Parallel Works, as well as recently designing sets for Kill la Kill and directing and character designing Trigger's short film series, Little Witch Academia.
For Harmony Unleashed in anime, he is the animation director for Trigger alongside Studio 4C's Yoshiyuki Kanno and Sunrise's Seiichi Nakatani, as well as key animation for the series in Human Ponidox Continuum Shift. Then he is the ponies' character designer for Harmony Unleashed: Equestrian Trinity and AppleSpark Chronicles (as well as animation director for ASC).
And then Trigger's first independent anime film adaptation of Anthro Bunraku, Aegis Resort as animation director and character designer alongside Sushio, as well as directing the film.