Haruno was born as the first-born son of Tadanao, and departed to the front of Boshin War as a member of Enshu Hokoku-dan (a troop mainly consisted of priesthoods and wealthy farmers in Shizuoka Prefecture) along with his father.
春野は忠尚の長男として生まれ、遠州報国団として父と共に戊辰戦争に従軍する。