Wolverine vol.1 #17,51Lord Shingen is the father of Mariko. Lord Shingen wanted to show Mariko that Wolverine was not worthy to be her husband, so he fought and defeated Wolverine. Lord Shingen called Wolverine an animal. Wolverine crippled Lord Shingen's illegal operations to dishonor him and then return to face him again. Wolverine wanted to prove himself and did by killing Lord Shingen in battle.