Some historians also consider that 'the Omodaka oban' was minted by order of Terumoto MORI whom Hideyoshi permitted to mint using the Goto family; the theory is based on the mark at the middle of the back of the oban, such as the Mori family's crest of Omodaka (a swamp plant), the Goto family's Kamon of paulownia in a hexagon and Goto's Kao; however, there is no positive proof for the theory yet.
裏面中央に家紋の一覧沢瀉（おもだか）、亀甲桐紋、花押の極印が打たれた澤瀉大判（おもだかおおばん）は秀吉が毛利輝元に後藤家で大判を作製することを許したと推定する説もあるが定かでない。