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Iyesa Nosa
Imperial Army, Sergeant Nosa... Reporting for duty!

Iyesa Nosa was a soldier dining at the La Carneval restaurant when John Wilson was murdered. He appeared as a witness during Ryunosuke Naruhodo's subsequent trial for the crime.

Thievery exposed[]

Main article: The Adventure of the Great Departure

Finding the salary of a soldier lacking when it came to providing for his young son, Aido, Iyesa resorted to stealing from the wealthy patrons of the La Carneval restaurant every three days. As he would eat at the establishment in order to appear as just a normal customer, he would avoid having to pay for cutlery by simply biting directly into his food. One day, while he was looking at the beefsteak he ordered after stealing a koban coin from an antique dealer named Kyurio Korekuta, a gunshot rang out from inside the restaurant which appeared to have originated from a young man holding a gun and resulted in the death of a foreigner. The apparent killer was quickly arrested. As an undercover detective called Satoru Hosonaga was preventing anyone from leaving, Iyesa realized that, as a witness, the police would search his pockets and find the koban. He therefore he hid it under the beefsteak he had been eating and swapped the plate with one at the table where the murder victim had been sitting, hoping that he would eventually be reunited with the coin and could then sell it.

Saluting with his son.

During the murder trial, Iyesa brought Aido with him. Detective Hosonaga told both him and Korekuta to keep quiet about the British woman who had also been at the restaurant, as it could cause diplomatic problems between Japan and the British Empire. However, the defendant, Ryunosuke Naruhodo, acted as his own defense attorney and was soon able to not only determine that she had been present at the crime scene, but also expose Iyesa as the one who had stolen Korekuta's koban. After Iyesa admitted his guilt, Naruhodo revealed that the beefsteak plate Iyesa had swapped had the victim's blood on it, which allowed him to prove that the British woman had been the true culprit all along.

Before Naruhodo left, Iyesa had an argument with Korekuta about the koban while Naruhodo asked them to move from the bench they were sitting on so he could look for his defense attorney armband, which he had misplaced. The two men then heard about how Kazuma Asogi first met Naruhodo, as well as how bad the former was at tongue twisters. At some point after this, Iyesa was put on trial for his theft.



As a soldier, Iyesa is very formal and tries to act in a disciplined manner, although this was frequently hindered during his appearance in court by the interference of his young son. Though proud to be a member of the Japanese military, the poor pay forced him to resort to petty theft to sustain his family. He considers beefsteaks the second most delicious dish in Western cuisine after cutlets.


  • His surname "Uzukumaru" (渦久丸) may come from "uzukumaru" (蹲る), meaning "to crouch".
  • His given name "Taizou" (泰三) may come from "taizou" (退蔵), meaning "hoarding", and possibly references his theft.
  • "Iyesa Nosa", his name in the English localization, is a play on "yes sir, no sir".