He worked alongside Go Nagai (Nagai saying that Iida reminded him of Totoro from My Neighbour Totoro) to try and create several Devilman OVA's. The final product was Devilman: The Birth which was later sequeled by Devilman: The Demon Bird. Iida expressed interest in continuing the series when he felt he had acquired the necessary funding, but with his death to cancer in late 2010 this plan did not come into fruition. However in 2000 an OVA based upon the Amon manga was released intended as a sequel to the Iida films. In 2011, his final series Towa no Quon was released in tribute to the late director.