Koichi Waku (1949-2015) was a Japanese Alzheimer's patient whose murder by Doctor Yoji Shono in 2015 resulted in the development of the "AD-9 conspiracy", unraveled by private detective Takayuki Yagami in 2018-2019.
Biography[]
Koichi Waku was born in 1949, and he was hospitalized at the Advanced Drug Development Center in Tokyo in 2013 after he developed Alzheimer's disease. While a general ward patient, he assaulted janitor Shinpei Okubo in 2015 after deludedly accusing Okubo of stealing his wallet. Shortly after, the ADDC's lead researcher Yoji Shono decided to test his new AD-9 Alzheimer's drug on Waku, performing a secret clinical trial without authorization and injecting Waku with the drug. Waku died almost instantly, suffering from severe migraines before toxins destroyed his brain and gave his eyes a blue pigmentation. Desperate to cover up his failed experiment, Shono hid Waku's body in a laundry cart and left it in Okubo's truck, where Okubo later discovered the body. As Okubo had a criminal record, he doubted the police would prove his innocence, so he drove into the Okutama mountains and buried Waku there. By the time the police had found him, his eyes had naturally decayed, causing any hint of AD-9's involvement to be lost; Okubo was promptly arrested for Waku's murder, only for lawyer Takayuki Yagami to secure his acquittal. Shono's guilt was not publicized until 2019, when Ko Hattori's tabloid implicated him and the other defenders of AD-9 in several murders.