|Mamushi Oil Field|
Mamushi Oil Field is a reference to the Mino Province (美濃国). Mamushi (蝮) is a type of serpent found in Japan. A famous character, Saito Dosan (斎藤道三), used to rule Mino during the warring states period, and was called "Mino no Mamushi" (美濃の蝮, Serpent of Mino) for his ruthless ways. He also used to be a oil seller, hence the pun "Mamushi Oil Field" where Mino's geographic location is. On a side note, historically, Saito Dosan's daughter married Oda Nobunaga (織田信長).