Zunigaclanofthebloodymist
Member
So we know wood release involves the use of earth plus water elements. Hashirama is basically the originator of this technique, but tobirama uses water probably can use earth elemental too. As we saw hashirama has a sage mode. So, my theory is that his wood release is the offspring of his senjutsu. Like naruto and his toad fu (or whatever) hashirama was taught the ability to combine the two elements. Just something I thought of.