Eastern Shikoku (the Awa Province and Sanuki Province) was not only close to Kinki, but the bases for power of the Hosokawa clan, it was involved in the political struggle in Kinki.
東四国（阿波国・讃岐国）は近畿に近いだけでなく、細川氏の勢力基盤でもあったから、近畿の政争にしばしば巻き込まれた。