In this type, the navigation performance was improved and the design was rationalized based on the operational results of the preceding 1954 planned boats (Kari-class, Kamome-class).

Therefore, in this model, the front and rear superstructures are integrated so that it can be easily moved back and forth even in stormy weather.

In addition, since the 1934 boat, corrugated panels have been adopted on the side walls of the superstructure to reduce man-hours and weight.

It was equipped with a V8 V22 / 30 type 4-cycle single-acting V-type 16-cylinder exhaust turbocharged diesel engine produced by Kawasaki Heavy Industries under a license agreement with MAN.

However, in the 1954 boats, an anti-submarine short torpedo equipped with a guidance device was adopted instead of the 55-type depth charge projector (so-called Y gun) placed on the rear deck.