The Sankebetsu brown bear incident (三毛別羆事件, Sankebetsu Higuma jiken), also referred to as the Rokusensawa bear attack (六線沢熊害事件, Rokusensawa yūgai jiken) or the Tomamae brown bear incident (苫前羆事件, Tomamae Higuma jiken) was the worst bear attack in Japanese history, killing seven settlers in Rokusensawa, Sankebetsu, Tomamae, Rumoi, Hokkaidō, Japan.