1. The Grey color of the ship is definitely to dark.
2. FCS-3A AAW and OPY-1 AAW was more white in 2017 and early version, it was first at a later time they started to appear in a similar color as the hull (see picture above)
3. On JS Shiranui you have some weird things going on with the hull color.
4. The hull shape; Sonar shape; ant the keg is not 100% correct either; etc. isn't correct, sadly, you can see that without looking at drawings and photos of the ship:
(note! a media drawing, not blueprint):
5. the underwater hull color is wrong:
6. The stabilization fins are placed wrong and to big, they would also have no effect in that area. Normally stabilization fins are placed either in front of aft engine room or aft of forward engine room, in this case the placement is in front of aft funnel:
7. The hull shading is way wrong.
8. JS Asahi VLS, lack color!
And it's many many more. When drawing ships where there is little good sources or drawings, it's important to use as many sources as possible, compare several pictures of the same things, yes it take time, but what you get is a really good drawing, then something that feels like it have been put together in a hurry. For example the rig the davids are mounted on, in front of the hangar, is not 100% correct, there should be some support beams and other things.
But you shall have for managing to remember to draw in all the red boxes, but some of them is life rafts!
oh make sure the black line along the water line, have correct width, it's look a bit wide for me.