Why didn't Hashirama break free from Edo Tensei in the Chuunnin exams?


**Spoiler Alert: For those who haven't seen episode 366 of Naruto
Shippuuden.**

As shown in episode 366 of Naruto Shippuuden, Orochimaru was able to restrict
the movements of nidaime hokage Tobirama. But he mentions that Hashirama could
have undone his binding at any time.

My question is why didn't Hashirama undo the binding during his reanimation at
Chunnin exams?




You will note that Tobirama, in the same scene tells Orochimaru that achieving
better fidelity/accuracy/efficacy with edo tensei will be the cause of his
downfall, since **this time** they have been revived with nearly their full
power.

This strongly suggests that Orochimaru did not perfect edo tensei at the time
of the Chunnin exams and that Hashirama was not at full strength and capacity.

Which explains why he did undo the binding at the time of the Chunnin exams -
he couldn't.

You will also note that Hashirama doesn't seem to recall Orochimaru, further
suggesting that he was not fully revived at the time, though that could simply
be his personality...




You will note that Tobirama, in the same scene tells Orochimaru that achieving
better fidelity/accuracy/efficacy with edo tensei will be the cause of his
downfall, since **this time** they have been revived with nearly their full
power.

This strongly suggests that Orochimaru did not perfect edo tensei at the time
of the Chunnin exams and that Hashirama was not at full strength and capacity.

Which explains why he did undo the binding at the time of the Chunnin exams -
he couldn't.

You will also note that Hashirama doesn't seem to recall Orochimaru, further
suggesting that he was not fully revived at the time, though that could simply
be his personality...

