Board Thread:Naruto Discussions/@comment-26822192-20200512085001/@comment-32685487-20200515162422

Yamato does have the regeneration ability, he healed soon after Sasuke stabbed him with his sword back in early Shippuden, it was the numbing effect from Chidori Katana that still had him a tad jacked up. DB4 even says that Yamato has it, also the reason Yamato's Wood Release doesn't seem as powerful is because he doesn't a high enough amount of chakra to do what Hashirama has done with it.