In addition to Kazuo Umezu, Ito has cited Hideshi Hino, Koga Shinsaku, Yasutaka Tsutsui, and H.P. Lovecraft as being major influences on his work.
Some of the recurring themes of Ito's work include body horror, seemingly ordinary characters who begin to act out of irrational compulsion, the breakdown of society, deep sea organisms, and the inevitability of one's demise.
Ito's universe is also very cruel and capricious; his characters often find themselves victims of malevolent unnatural circumstances for no discernible reason or punished out of proportion for minor infractions against an unknown and incomprehensible natural order.
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