Ieyasu established relations by affinity between himself and Mitsunari's adversaries, such as Masanori FUKUSHIMA, Kiyomasa KATO and Nagamasa KURODA, without the permission of the Toyotomi clan, doing so in order to gain supremacy.
家康は覇権奪取のため、三成と敵対関係にあった福島正則や加藤清正、黒田長政らと、豊臣氏に無断で次々と縁戚関係を結んでゆく。