As we know Hashirama performed genjutsu on the 3rd Hokage, the 3rd Hokage didn’t attempt to break his genjutsu. The question how powerful is his genjutsu.
Hashirama is not a yin type by databook, so it makes it more impressive that Hashirama can even use genjutsu. Jiraiya states only someone with high intellect can learn genjutsu, meaning Hashirama must be smart then.
Hashirama is not a yin type by databook, so it makes it more impressive that Hashirama can even use genjutsu. Jiraiya states only someone with high intellect can learn genjutsu, meaning Hashirama must be smart then.