The diary of Ishin Suden, also known as 'The Minister in Black,' gives detailed accounts of the drafting of edicts including the Buke Shohatto (Regulations for Warrior Households) and events such as the Hoko-ji Bell Inscription Incident that led to the fall of the Toyotomi family.
「黒衣の宰相」とも呼ばれた以心崇伝の日記で、武家諸法度などの起草過程や豊臣家滅亡のきっかけとなった方広寺の鐘銘事件などが克明に記されている。