里見家　安房の海運をおさえて北条氏に対抗、上総へ勢力を拡大【戦国大名家の歴史36　秦野裕介日本史講座】

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.

A 72-minute video from 日本史オンライン講座: “里見家　安房の海運をおさえて北条氏に対抗、上総へ勢力を拡大【戦国大名家の歴史36　秦野裕介日本史講座】”.

Video by 日本史オンライン講座, played through YouTube's embedded player.