[Why is a Japanese citizen included in the Chinese Exclusion Act files?
The Chinese Exclusion Act did not exclude Japanese citizens. Kaju Yamauchi was detained because he could not be admitted with trachoma and hookworm. According to the immigration authorities hookworm would affect his ability to earn a living and trachoma was a dangerous contagious disease.]

Kaju Yamauchi, age 13, arrived in Seattle, Washington on 26 April 1919 on the S.S. Fushimi Maru. He was born in Aichi-ken, Japan on 20 January 1906 and his last permanent residence was Sofuei-cho, Japan. He was going to live with his father, Karoku Yamauchi, San Joaquim #5 Tract, Stockton, California. When Kaju arrived he had trachoma and hookworm. According to the Assistant Commissioner-General of Immigration, Kaju’s father, a prosperous farmer, would pay for his son’s treatment. Kaju received hospital treatment, was cured, and admitted to the United States 110 days later on 16 August 1919. The charges on the statement were for 333 meals: $78.26; charge for hookworm: $17.60; charge for trachoma: $50.00; and a telegram: $1.30; total: $147.16.