The Momo class scaled the Isokaze design down to about three-quarters of its displacement and a complement of roughly 110 rather than 128. It dropped one 120 mm gun but retained two triple 450 mm torpedo launchers, preserving a six-torpedo battery in the smaller hull. Momo construction began in February 1916, ahead of Isokaze construction in April, because more yards could build the smaller type. Limited domestic turbine output led Hinoki and Yanagi to use British Brown-Curtis machinery, while Momo and Kashi received Japanese-designed turbines. Buying British machinery allowed construction to proceed despite limits on how quickly domestic manufacturers could supply it.
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The Momo class works around yard and turbine limits
The smaller Momo class retained six torpedo tubes and much of the larger design's fighting value while fitting Japan's available yards and turbine supply.