Port quarantine, including hospitals connected therewith; seamen's and marine hospitals.

In 1899, Dr. Noguchi worked at the Yokohama Port Quarantine Office as an assistant quarantine doctor.

His tenure was chiefly marked by the first recorded outbreak of yellow fever, and the subsequent creation of the city's first Board of Health in 1817, which among other things provided for systematic garbage removal, and the institution of a port quarantine.