Board Thread:Theories and Speculation/@comment-3001903-20160813043039/@comment-734582-20160813110656

It seems fairly logical to me that he had Wood Release. We already know many Kekkei Genkai were watered down or outright disappeared (e.g. Byakugan in many clans, Shikotsumyaku with the Kaguya Clan, the Hidden Mist murdered them), which is why the Senju didn't have it as a common KKG anymore.