The
Momi class was designed with higher speed and better
seakeeping than the preceding second-class destroyers. The ships had an
overall length of and were
between perpendiculars. They had a
beam of , and a mean
draft of . The
Momi-class ships displaced at
standard load and at
deep load.
Yomogi was powered by two
Zoelly geared
steam turbines, each driving one
propeller shaft using steam provided by three
Kampon water-tube boilers. The turbines were designed to produce to give the ships a speed of . The ships carried a maximum of of
fuel oil which gave them a range of at . Their crew consisted of 110 officers and crewmen. The main armament of the
Momi-class ships consisted of three
Type 3 guns in single mounts; one gun forward of the
well deck, one between the two
funnels, and the last gun atop the aft
superstructure. The guns were numbered '1' to '3' from front to rear. The ships carried two above-water twin sets of
torpedo tubes; one mount was in the well deck between the forward superstructure and the bow gun and the other between the aft funnel and aft superstructure. ==Construction and career==