User blog comment:Xilinoc/Ch. 562 - THE VILLAIN 2 (Mask De Masculine is a Mexican luchador in a German army)/@comment-24306779-20131219190531/@comment-26420452-20131219210812

I agree with Xilinoc, the boost in Reiryoku comes from Hikifune's food. I reckon that the training at Hyōsube's palace has given him among other things a boost in speed due to the extremely dense Reishi there.