Question: is kosaku kawajiri yoshikage kira?
Answer: Kosaku Kawajiri (川尻 浩作 Kawajiri Kōsaku) is a minor character featured in Diamond Is Unbreakable. He is murdered by Yoshikage Kira to preserve his quiet lifestyle and escape justice. After his death, Kira masqueraded as Kosaku and integrated himself into Kosaku's family and life.