Terror! The Monster That Lurks Underground

'''Terror! The Monster That Lurks Underground''' is the two hundred fifty-ninth episode of the Bleach anime.

A group of Shinigami must go into the sewers to fight a Tōjū. They are aided by Hanatarō Yamada's Zanpakutō Spirit who has been living in the sewers.

Summary
While Lieutenants Nanao Ise and Isane Kotetsu are in the 4th Division barracks, where the Gotei 13 temporary headquarters are located, they notice how several items have gone missing lately. Eventually, even Hanatarō Yamada's four chickens are stolen. It is then that Captains Shunsui Kyōraku, Ukitak, and Retsu Unohana decide to send an expedition team into the sewers, where the tracks of the culprit lead. The team sent includes Hanatarō, Nanao, Ikkaku Madarame and his Zanpakutō, Hōzukimaru.

While investigating, the team discovers multiple traps, with one of them washing them into an unfamiliar part of the sewers, where Ikkaku is attacked and dragged away by a large tentacled creature. The others try to help him, but the creature submerges again and the resulting wave washes them away.

Back on the walkway, Hanatarō blames himself for Ikkaku's demise, but Hōzukimaru reassures him that Ikkaku still lives. The team suddenly notices the smell of something cooking and go to investigate. They find a small tent with a barbecue burning at the front of it and a stand that contains many of the items stolen from the barracks. Hanatarō suspects the meat cooking on the barbecue came from his stolen chickens. A sound alerts them to the presence of a small figure wrapped in a torn robe, who turns to run as soon as he sees them.

Hōzukimaru and Nanao chase the creature towards Hanatarō and he trips and crashes into the latter's head. The robes removed reveal a small robot like creature with a gauge in the place of his left eye. Hanatarō thinks the creature looks familiar. Nanao and Hōzukimaru try to interrogate the creature, but only manage to make him too nervous to answer their questions. The interrogation is cut short when an explosion tears through the wall and Ikkaku is hurled through it and lands next to them, unconscious and severely wounded.

The tentacled creature from before is revealed to be a Tōjū. Hōzukimaru attempts to attack him using Bankai, but the blades just slip away, and the monster grabs him with one of its tentacles. Nanao hits it with Shakkahō, but the beast is unscathed and throws Hōzukimaru away. When Nanao is also grabbed by the Tōjū, Hanatarō is powerless to help, having left his Zanpakutō at his quarters.

The robot like creature grabs a Katana, similar to Hanatarō's, and stabs Ikkaku with it. Instead of hurting him, Ikkaku's wounds are healed as the gauges on the sword and the robot's face fill. When the gauges are full, a flap in the robot's chest opens to reveal an enormous cannon. It unfolds and launches a massive blast of energy towards the Tōjū, destroying him.

The strange robot creature turns out to be the materialization of Hisagomaru, Hanatarō's Zanpakutō. He believed his master has rejected him and left to live a life of recluse. He turned to stealing to relieve his loneliness and reveals that he stole the chickens to keep them as pets and that they are still alive.

The group returns to the surface and retrieves all the stolen goods, but Hisagomaru manages to lose his way and is left behind.

Shinigami Illustrated Picture Book
When Ichigo Kurosaki comes home, Yuzu Kurosaki informs him she heard noises from his room. When he goes to inspect he finds a huge sign on the door saying "sword fiend squad real world headquarters". When he opens the door he finds Captain Tōshirō Hitsugaya, Lieutenant Rangiku Matsumoto, Lieutenant Renji Abarai, Ikkaku, Yumichika Ayasegawa, and Rukia Kuchiki along with their Zanpakutō. Without saying a word, Ichigo closes the door.

Characters in Order of Appearance

 * 1) Isane Kotetsu
 * 2) Nanao Ise
 * 3) Hanatarō Yamada
 * 4) Shunsui Kyōraku
 * 5) Jūshirō Ukitake
 * 6) Retsu Unohana
 * 7) Ikkaku Madarame
 * 8) Hōzukimaru
 * 9) Akon
 * 10) Tentacle Tōjū
 * 11) Hisagomaru

Powers and Techniques Used
Shinigami techniques used:



Kidō used:
 * Hadō #31,

Techniques used:

Zanpakutō released:

Shikai:

Bankai: