Gillingham is a large town in the unitary authority area of Medway in the ceremonial county of Kent, England. The town forms a conurbation with neighbouring towns Chatham, Rochester, Strood and Rainham. It is also the largest town in the borough of Medway.
Gillingham is also the birthplace of the Elizabethan seafarer, William Adams who founded the first Japanese navy and made famous of James' Clavell's novel shogan. Today the town is twinned with the cities of Ito and Yokosuka in Japan.