Kichizo (a Chinese priest in the 6th-7th centuries) described in his "Hokke Genron" that there should have been really deep impetus for Kumaraju to change the word "sho" to "myo."
吉蔵は『法華玄論』2で「什公、正を改めて妙となすは、必ずまさに深く致すところあるべし」と述べた。