Higashiichi directed Asuka Saito's "Tokyo Labyrinth'', a bonus video included in the Type-B of Nogizaka46's 22nd single "Kaerimichi wa Toomawari Shi-taku Naru'' CD + Blu-ray edition. It is a poetic video depicting Saito walking in the rain through the back alleys of Tokyo, "Tokyo Labyrinth'', accompanied by a piano accompaniment that seems to express his mental image.