General
"OST" isn't in the tags of Kiiwa's diff. Make sure tags are the same across all difficulties.
Kiiwa's Hard
Those sliders are more ugly than unreadable, lol. I'm cool with them staying as they are.
00:48:607 (3) - This slider is 1/4 later than it should be
00:56:211 (1) - This should be snapped to 1/3 (purple) ticks. The slider multiplier for this slider can be changed to 1.5 so it still matches the other sliders.
01:23:295 (1) - Perhaps make this a 1/3 repeating slider instead?
That's all. Should be able to rank when this is done.