Yamato is a ninja mentioned by Kozō as the worst outcome of Hashirama cells experimentation, where the subject either bursts or turns into wood. He is known as an Anbu captain who possesses Wood Release due to being implanted with Hashirama cells. In this timeline, he is only referenced as a possible extreme result of cell assimilation. Kozō worries that using undiluted Hashirama cells could lead to a similar fate as Yamato, which he avoids through his system. Yamato represents the dangers of reckless cell absorption.
