I was able to pick out a couple medaka eggs and this time they're in methylene blue so hopefully they won't cloud up and die. I didn't take a photo at 1 day post fertilization but this one is at about the 2 dpf point.
At 1dpf, I could see the oil droplets coalesced into 2 drops (no photo).
Today (day 2 pf) there's one obvious oil drop, a large yolk and embryo.
For reference, below is roughly 1 day(a) and 2 days(b) from an article taken with a much better microscope.