Episode 977

"The Sea Is For Pirates! Raid! To Onigashima" is the 977th episode of the One Piece anime.

Short Summary
The Nine Red Scabbards set sail, where Kanjuro reveals himself to be the spy all along. He also turns out to be just a drawing, with his real self at the port capturing Momonosuke. Luffy, Law and Kid arrive and prepare to attack the enemy ships.

Long Summary
None of the people who promised to arrive at Tokage Port arrive, not even Luffy. The Nine Red Scabbards realize that since they took over Udon, Kaidou's forces will be informed of their presence soon. So, they have no choice but to set sail for Onigashima immediately, getting on a small rowboat to traverse the stormy waters.

This marks the third time that their plans have been leaked to Kaidou's forces. Kin'emon deduces that there must be a spy among Oden's retainers. Kaidou hinted at a spy before but Kin'emon did not believe him until now.

Kanjuro makes the shocking revelation that he was the traitor. Being hunted for being a member of the Kurozumi Family his whole life, he decided to infiltrate Oden's retainers, sending confidential information to Orochi. Back in Zou, he told Jack that Raizo was located there, and he told Orochi about the new rendezvous point given by Yasuie. Orochi sabotaged the mission by bombing all connecting bridges, as well as the Thousand Sunny.

Now aware of the Nine Red Scabbards' whereabouts, Kaidou's battleships are all lined up, ready to sink their rowboat. Kin'emon cuts down Kanjuro, only to reveal that it is only a drawing of him. The real Kanjuro is still at the port. He restrains Shinobu with drawn snakes and captures Momonosuke. Since Kanjuro was not on the ship, the Beasts Pirates bombard it with cannonballs.

The Straw Hats finally appear, having managed to repair the Thousand Sunny in time. The Thousand Sunny strikes the enemy ships with cannonballs. Law's submarine also appears from underwater, and so does Kid's ship from the opposite side. The three captains prepare to battle against the enemy forces.

Anime Notes

 * The anime adds the following:
 * Additional dialogue before the revelation of the Scabbards traitor, mainly the samurai speculating on the traitor's possible motives, then Kin'emon blaming his own incompetence for allowing one of his allies to be coerced into spying for Orochi before Kikunojo talks him out of it.
 * The reveal of Kanjuro's betrayal is expanded. In particular, Kanjuro revealed he leaked the first plan of the Nine Red Scabbards to Kurozumi Orochi, and gave Jack the Vivre Card required for him to reach and destroy Zou.
 * Kanjuro drawing the snakes to bind Shinobu.
 * The Beasts Pirates firing cannonballs at the samurai, and Ashura slicing one cannonball in half.
 * Law and Kid get an added dialogue each.
 * The anime changed the following:
 * In the manga, the Straw Hat Pirates appeared before the Beasts Pirates' ship was attacked.
 * In the manga, the Thousand Sunny's sails are folded when the Straw Hats arrive, but in the anime they are spread and seen patched up.