和親 is read as わしん (washin) and means friendship.
わしん
washin
わしんじょうやく
treaty of peace and amity
しんわ
friendship
しんわじょしだいがく
Shinwa Women's University
しんわかい
Shinwa-kai (yazuka syndicate)
しんわりょく
affinity
しんわせい
にちべいわしんじょうやく
Japan–US Treaty of Peace and Amity (March 31, 1854)
にちろわしんじょうやく
Treaty of Shimoda (1855)
しんわせいせいじゅく
affinity maturation
かんきょうしんわがた
environmentally-friendly
こうべしんわじょしだいがく
Kobe Shinwa Women's University
わかい
court-mediated settlement