My conclusion from the writings of Nichiren Daishonin of the prior long debate on Original Enlightenment between Reverend Yasuhara and Graham Lamont

In the general sense, as emanations of the Original Buddha, when we chant the Daimoku and perform conversion activities we are Three Bodied Tathagatas. However, our Parent, Teacher, and Sovereign, remains Shakyamuni Buddha of the Juryo Chapter of the Lotus Sutra. In the "specific sense", Shakyamuni of the Juryo Chapter is the one Original Eternal Buddha. Even the Ancient Buddha, Many Treasures Buddha (Taho Buddha), though having attained Buddhahood in the remote past, is not the Original Buddha who attained Buddhahood in the most distant past. Likewise, though some of us too are ancient Buddhas, we too owe our very Enlightenment to the Original Eternal Buddha Shakyamuni.