Part of the Yodo-class, consisting of the Yodo and Mogami, already outdated before built. Difference between both ships was the 2 funnels and clipper bow of the Yodo and the straight raked bow and 3 funnels of the Mogami. Officially classified as dispatch boat or aviso to be used for as high speed scouts and despatch vessels,
Laid down by Kawasaki Shipyards, Kobe, Japan on 2 October 1906, launched on 11 November 1907, commissioned on 8 April 1908, reclassified as gunboat 1st class on 12 October 1912, surveying vessel after 1918, renamed Hulk 13 and decommissioned on 1 April 1940, berthed at Iwakuni during the war and broken up at Hikari in 1945.
Displacement 1.270 tons and as dimensions 93,1 (over all) x 9,5 x 3 metres or 305.5 x 31.2 x 9.10 feet. Machinery consisted of 2 reciprocating vertical triple expansion steam engines and 4 Miyabara boilers supplying 6.500 shp via 2 shafts allowing a speed of 22 knots. Bunker capacity of 339 ton coals and 76 ton oil. Crew numbered 116 men, Armour consisted of a 6,2cm/2.4” thick deck with the conning tower protected by 5cm/2”. The original armament consisted of 2-1.9”/4.7”Mk I-IV quick firing guns, 4-12pd 12 cwt quick firing guns, 1 machinegun and 2-45,7cm/10” torpedo tubes.
