This Asano's act displeased Kirano Kozuke no Suke who was into bribery (as described later, the term bribe used here has a different meaning than the modern term), and the cause of the incident is thought to be Kira pointing out every single fault to Asano Takumi no Kami, who was not familiar with his position as an attendant such as the ways Asano contacted Inshi, re-covered the tatamis of Zojo-ji Temple and wore different formal dress inside the palace.
これが賄賂好き（後述の様に、現在の賄賂とは意味合いが異なる）な吉良上野介の不興を買い、饗応役に不慣れな浅野内匠頭に対して勅使への音信、増上寺の畳替え、殿中礼服の違いなど事あるごとに苛めたことが原因としているものが多い。