Thonburi was a coastal defence ship ordered by the Thai navy, and built in Kawasaki Dockyard Japan, being launched on the 31st June 1937, and commissioned a year later. The ship displaced 2,350 tonnes and carried a set of 2x2 200mm Japanese guns, alongside a small arangement of self defence weapons. Her only enguagement was the battle of Ko Chang against the French light cruiser Lamotte Piquet, which resulted in Thonburi taking heavy damage before sinking. Eventually she was refloated and served until midd 1959 when she was decommissioned and partly turned into a museum ship at the Royal Thai Naval Academy.