Sage Fukasaku

Biodata

Feature	Value
Name	Sage Fukasaku (深作仙人) 498
Species/Race	Ninja Toad 372 498
Gender	Male
Affiliation	Mount Myōboku; later the Mount Myōboku–Bloody Mist alliance in the New World 339 498
Occupation/Role	Sage, Jiraiya's Sage Art instructor, second-in-command of Mount Myōboku, Ninja Toad commander, and strategist 301 339 497
Status	Alive; operating in the New World with surviving Ninja Toads and Biwa Jūzō's Mist forces 498 510
First Appearance	Chapter 260 260

Background / History

Mount Myōboku sage

Fukasaku served as one of Mount Myōboku's senior sages and its second-in-command under the Great Toad Sage. Although he sometimes referred to the ancient leader disrespectfully, he held genuine reverence for him as the pillar sustaining the Mount Myōboku lineage. 295 339

He and Sage Shima visited Konoha as emissaries after the Great Toad Sage foresaw a prophecy connected to a possible Savior of the Ninja World. Uchiha Tokimitsu refused them permission to inspect the village, treating the request as a threat to Konoha's dignity and security. 260

Jiraiya's mentor and Mount Myōboku's intervention

After Jiraiya fled to Mount Myōboku, Fukasaku supervised his Sage Art training. His instruction enabled Jiraiya to enter Sage Mode independently within Mount Myōboku's dense Natural Energy, though Fukasaku considered Jiraiya's control insufficient for combat outside the sacred land. 301

Fukasaku told Jiraiya that his mission was to find and guide the Ninja World's Savior, while portraying Uchiha Tokimitsu and the Uchiha Clan as enemies of that future. He later identified the Uchiha as descendants of Indra and as the “dark force” opposing the Savior's rise. 301 306

Konoha's purge of Mount Myōboku Ninja Toads deeply affected Fukasaku. He sought retaliation from the Great Toad Sage, then began gathering Ninja Toad forces and contacting Jiraiya as Mount Myōboku committed itself more directly to the conflict. 313

War against the Shogunate

Fukasaku commanded Mount Myōboku's Ninja Toads during the campaign against the Shogunate. The Great Toad Sage authorized support of up to five thousand elite Ninja Toads, ordering Mount Myōboku to withdraw from worldly affairs if that casualty limit was exceeded. 339

He remained uneasy about the war's cost, especially after Uzumaki sealing barriers prevented Ninja Toads from escaping by Summoning Technique and left them isolated against organized ninja forces. Despite those doubts, he continued backing Jiraiya and sought cooperation with Iwagakure, Kumogakure, and Ryūchi Cave. 339 370 372

Fukasaku and Shima fought alongside Jiraiya using Mount Myōboku Sage Art. Their side was gradually worn down by Uchiha Tokimitsu's superior Chakra reserves, Perfect Susanoo, and access to Tailed Beast Chakra. 374

Shima was ultimately captured after attempting to flee with Fukasaku and Asura through a Space-Time Rift. Her death left Fukasaku devastated; his Sage Chakra became unstable, and petrification began spreading from his feet. 399 400

Escape to the New World

As the Uchiha Dynasty prepared to invade Mount Myōboku, the Great Toad Sage ordered Fukasaku to lead one thousand elite Ninja Toads and nearly one hundred thousand high-grade frog eggs to the New World. Fukasaku enforced the evacuation despite the fear and resistance of many toads. 482 485

The Great Toad Sage created a flesh-and-blood clone disguised as Fukasaku to delay the invaders. The decoy was later devoured by Tagorihime during Mount Myōboku's final destruction. 482 488

In the New World, Fukasaku initially hid his surviving kin and gathered intelligence on local powers. He intended to preserve the Ninja Toads until the Ninja World army arrived, then establish himself as a strategist rather than sacrifice his people in further open warfare. 497

Alliance with the Bloody Mist

Fukasaku intercepted a treasure convoy and later approached Biwa Jūzō, revealing that Mount Myōboku had been destroyed by Uchiha Tokimitsu. He used supplies, intelligence, and strategic advice to form an alliance with the surviving Bloody Mist faction. 498

He encouraged Biwa Jūzō to build strength in secret, seek a favorable kingdom or ruler to influence, and avoid direct confrontations with stronger enemies. Fukasaku privately viewed the Mist forces as shields that could protect the remaining Ninja Toads. 498 510

Appearance

Fukasaku is a small Ninja Toad, described as roughly half a man's height. He commonly wears a cloak, which he removed when formally introducing himself to Biwa Jūzō. 498

• A frog sage with the ability to speak human language. 372 498
• Frequently stands with his hands clasped behind his back while considering strategy or addressing subordinates. 313 339
• His grief after Shima's death destabilized his Sage Chakra and caused gradual petrification below his knees. 400

Personality

Fukasaku is deeply protective of the Mount Myōboku lineage. The deaths of Ninja Toads under his command drive much of his willingness to intervene in human conflicts, even when he doubts whether such involvement can succeed. 339

He is pragmatic and politically calculating beneath his outwardly dignified manner. He gathers intelligence through spy frogs, seeks alliances with other powers, and carefully steers Biwa Jūzō toward policies that serve Mount Myōboku's survival. 301 498 510

His loyalty to the Great Toad Sage is profound, but not unquestioning. He repeatedly worries over the Great Sage's decisions to enter the Ninja World, deploy more troops, and later abandon Mount Myōboku for a cross-world evacuation. 295 339 481

Abilities & Skills

Sage Art and Sage Chakra

Fukasaku is a Mount Myōboku sage capable of using Sage Chakra and assisting others in its application.

• Trained Jiraiya to gather and control Natural Energy, helping him achieve Sage Mode within Mount Myōboku. 301
• Fought beside Jiraiya and Shima using Sage Arts during the war against Uchiha Tokimitsu. 355 374
• Can coordinate Sage Chakra with a host through the connection between Jiraiya and the Two Sages. 374
• His Sage Chakra became dangerously unstable after Shima's death, causing recurring petrification that even the Great Toad Sage struggled to suppress. 400

Sage Talisman evacuation

Fukasaku possessed access to a talisman empowered by the Great Toad Sage.

• The talisman could be used by Fukasaku and Shima as an emergency escape method when ordinary options failed. 372
• The Great Toad Sage ultimately used his power to help Fukasaku escape through a Space-Time Rift with Asura. 399
• Its use depended on the Great Toad Sage's intervention and did not prevent Shima's capture. 399

Command and strategy

Fukasaku is an experienced commander and intelligence operative.

• Commanded Mount Myōboku's Ninja Toad forces during its intervention in the Ninja World. 339 372
• Deployed spy frogs to monitor Konoha and gather information on Jiraiya's situation. 301
• Recognized the danger posed by Uzumaki sealing barriers, which could block the Summoning Technique and trap Ninja Toads on the battlefield. 339
• Built an alliance with Biwa Jūzō by combining resources, intelligence, and long-term political strategy. 498 510

Relationships

• Sage Shima — His wife and fellow Mount Myōboku sage. They jointly supported Jiraiya's Sage Mode and fought beside him; Shima's eventual death devastated Fukasaku. 301 354 400
• Great Toad Sage — Mount Myōboku's leader and Fukasaku's revered superior. Fukasaku often challenged his decisions but relied on his authority, prophecies, and Sage Art. 295 313 339
• Jiraiya — Student and Mount Myōboku's designated Earth Walker. Fukasaku trained him in Sage Art and urged him to seek the Savior of the Ninja World. 301 306
• Asura — Initially a crucial ally after reincarnating through Jiraiya's body; their relationship collapsed after Asura turned against Mount Myōboku and exposed its schemes. 378 447
• Uchiha Tokimitsu — Principal enemy of Mount Myōboku. Fukasaku framed him as the Savior's enemy and later watched his forces destroy the sacred land. 301 488 489
• Biwa Jūzō — New World ally and leader of the Bloody Mist faction. Fukasaku manipulated their shared defeat by the Uchiha into a mutually useful alliance. 498 510
• Toad Kosuke — A messenger toad entrusted by Fukasaku to deliver information and contact Jiraiya after Konoha's purge. 313

Notable Quotes

“Uchiha Tokimitsu will be the Savior's enemy. He will bring grave harm to the Ninja World!” — Fukasaku 301

“We must retaliate in kind!” — Fukasaku 313

“The Ninja World today has been completely controlled by evil forces led by Uchiha Tokimitsu...” — Fukasaku 498