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Koiso MATSUKICHI
Koiso Matsukichi is a retired detective who worked for the Woodpecker Detective's Office. He was known for his sharp mind and keen observation skills, which helped him solve numerous cases throughout his career. However, during a particularly dangerous case, Matsukichi was injured and lost his left arm. Despite this setback, he refused to retire and continued to work as a detective, using his artificial limb to assist him in his investigations.