Utsubo 【靱】1 The Japanese surnames etymology dictionary.
Oosaka-fu Matsubara-shi . Origin of Oosaka-fu Habikino-shi Eboso. Place name with a record in the notation of "Kaiba" in the Heian era. Oosaka-fu Matsubara-shi Meiji New surname by monk of Hōsenji Temple of Jodo Shinshu in Izuya.
※ There is a record of Eminen 's family name in 812 (Hirohito 3 years).