黒衣の宰相[kokuinosaishou] Buddhist priest who is a government minister
宰相[saishou] prime minister
主宰[shusai] supervision
主宰者[shusaisha] president
宰領[sairyou] supervision

宰相の器[saishounoki] person qualified for prime minister
伴食宰相[banshokusaishou] an incompetent cabinet minister
総括主宰者[soukatsushusaisha] (electoral) campaign manager
大宰府[dazaifu] dazaifu (under the ritsuryo system, governmental office with jurisdiction over Kyushu, Iki and Tsushima)
冢宰[chousai] Minister of State (Zhou-dynasty China)

鉱滓[kousai] slag
残滓[zanshi] remains
油滓[aburakasu] oil cake (fertilizer made of oily vegetable dregs)
味噌っ滓[misokkasu] miso lees
燃え滓[moekasu] cinders

食べ滓[tabekasu] leavings of a meal
搾り滓[shiborikasu] strained lees (e.g. sake, tofu)
熔滓[youshi] slag
搾め滓[shimekasu] oil cake