醍醐天皇　摂関家と関係を修復、摂関政治で安定した皇位継承へ【皇后と皇位継承】

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.