However, when Hideyoshi and Ieyasu compromised and Narimasa was driven to the extremity, he had a great achievement that he crossed over Hida Mountains and Tate-yama Mountains and entered the Hamamatsu City at midwinter to persuade Ieyasu to have another try.
ところが秀吉・家康らとの間で和議が成立し、進退が窮まると、成政は家康に再挙を促すため、厳冬の飛騨山脈（飛騨山脈）・立山山系を越えて浜松市へと踏破するという壮挙を成し遂げた。