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In his final fight against Naruto and Team Kakashi, Kakuzu is defeated by a new generation. While he curses them, Kakashi notes that being surpassed by the youth is a natural cycle.

Originally, Kakuzu was an elite, loyal Jonin from the Hidden Waterfall Village (Takigakure). He was tasked with an impossible, near-suicidal mission: to assassinate Hashirama Senju, the First Hokage and "God of Shinobi".

When reanimated, Kakuzu's soul is described as returning to the afterlife with a calm demeanor, perhaps finally free from his long, angry life. kacszu

His life is a story of a dutiful soldier turned into a soulless "Frankenstein" monster by the cold, unforgiving bureaucracy of the Shinobi world. If you want, I can: Rank his strength against other Akatsuki Detail his five elemental hearts Explain his partner Hidan's abilities Let me know how you'd like to narrow down the list. The Immortal Kakuzu: Anatomy of a Shinobi Villain

After barely surviving the fight, Kakuzu returned home expecting recognition, but was instead shamed and imprisoned for his failure. In his final fight against Naruto and Team

The village elders who commanded this unfair punishment were his first victims. He broke out, stole the village's forbidden jutsu, and ripped out their hearts.

Kakuzu's obsession with money isn't just greed; it's a cynical belief that people, villages, and loyalties are fickle and treacherous, but money is constant and reliable. He was tasked with an impossible, near-suicidal mission:

Many see Kakuzu not as someone hoarding money to spend, but as a control freak who needs to possess resources so they cannot be used against him.