六角家　佐々木氏の宗家、観音寺城を本拠にする南近江の戦国大名【秦野裕介立命館大学授業担当講師　戦国大名家の歴史20-1】

New channel 日本史オンライン講座: title sample judged 'whole' (A dedicated Japanese history teaching channel with lecture series, scholar-led seminars, and structured courses that ove); 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.