a. Coming after years of construction from British designs, and a transitional series (Akikaze-class) of their own, the Japanese Fubuki- class destroyers of the 1920s and 1930s represented the first modern IJN fleet DDs. From them stemmed all subsequent fleet destroyers. They were still around in 1942.
The Fubukis were a great improvement on previous designs. With a larger, better hull form, more and larger guns, 24-inch (not 21-inch) torpedoes, and new hydraulic ammunition hoists, the Fubukis mounted six 5-inch (no longer 4.7-inch) guns in twin turrets (3 x 2) and nine torpedo tubes in three protected batteries (3 x 3). Displacing 1,750 tons, they were capable of 38 knots. They carried a full set of reload torpedoes on board.
The even larger Kagero-class DDs of the 1930s and 1940s were as good as they came. They represented all that the IJN valued in a DD. Descended from the Fubukis, they were even better sea boats. Like the Fubukis, the Kageros mounted six 5-inch guns in three twin mounts, but these guns were now dual purpose (anti-surface and anti-aircraft) guns. There were now only two 24-inch torpedo batteries, but they were quadruple (2 x 4) shielded mounts. Again, there was a full set of reload torpedoes, but they were better placed. All this on 2,033 tons capable of 35 knots.