I usually print on Fuji Pro paper and C(0) M(0) Y(50) works very well as a starting point for outdoor daylight frames.
What's a good starting point for Kodak Endura paper?
Telling from my (admittedly limited) experience, it is highly unsual that you have determined a yellow only filtration for your paper. I have never experienced such filtration for a normal daylight shot, but then I am not an expert at all in RA4 printing. Maybe the type of light source or the paper itself plays a role.
To answer your question, I have only once directly printed Kodak (EP) and Fuji (DPII) paper alongside from the same negative trying to mach the look as exactly as possible. According to my notes the result was the following:
Kodak EP: 67Y / 85M / 35ND
Fuji CA DPII: 77Y / 82M / 42ND
10 ND values equal to about 1/3 stop of exposure.
However, when I look at the two prints now, the Kodak one seems to have ever so slightly more yellow in the midtone greys.
So it could well be that the ideal yellow filtration was a bit closer (higher for the Kodak) than I thought at the time.
I am sceptical that this of any relevance to you, because the details of the filtration will differ depending on the negative, the enlarger, the age of the halogen lamp, the age of paper, the type and temperature of processing etc. I am also not sure that the Fuji pro paper you purchase in Japan is directly comparable to Fuji pro paper that is manufactured and sold in Europe or the US.
It would be interesting to hear about your experience with the Kodak paper.