Sakamoto Days dives deep into the world of assassins, introducing intimidating killers trained in various methods of combat. The story follows Taro Sakamoto, a legendary hitman who retires and lives peacefully with his wife and daughter. However, when former acquaintances seek him out, he is compelled to return to the treacherous world of assassination.
Sakamoto Days has no shortage of exciting fights, featuring not just the protagonist but the entire extended cast. Given the emphasis on combat prowess, fans might wonder who the strongest assassin in the series is. Takamura, The Phantom of the JAA, is the most powerful assassin in Sakamoto Days.
Unlike other battle shonen anime and manga, where there are constant debates on the single strongest, Sakamoto Days has acknowledged that Takamura is the most fearsome of all its killers.

Takamura is an elderly man who is part of the Order, an elite unit with the JAA's strongest assassins. Even in this organization where strength is the baseline for survival, Takamura’s powers are considered almost mythological. His main purpose in the series is to instill terror with every appearance.
Nothing is known about Takamura’s past, and he has no distinct personality traits apart from his ruthlessness. He constantly mumbles and doesn’t have too many dialogues. However, Takamura shows bloodlust to anyone who opposes him and the JAA. Even the main antagonist, Uzuki, feared this old man and was shocked that he was still alive when they met.
While most assassins in Sakamoto Days use fancy gadgets and equipment, Takamura relies only on his katana. He uses this as a cane on occasion, but it causes mass destruction whenever unsheathed. His swordsmanship is masterful and powerful enough to cleanly slice apart limbs and cut through buildings.
This is enhanced by Takamura’s unmatched senses, speed, and reflexes. He can keep up with bullets shot at him and overpowers Sakamoto, Nagumo, Uzuki, Haruma, and Gaku at the same time. Despite facing the strongest of the main characters and the villains, Takamura could block and adapt to all their hits, making them feel true despair during their battle.
Is Takamura the strongest character in Sakamoto Days?
While Takamura is the strongest assassin in Sakamoto Days, that does not mean he is the overall strongest character. This is because the main antagonist, Uzuki, has a cheat-like skill that allows him to overturn the outcome of any battle whenever he starts to lose.
Due to his Dissociative Identity Disorder, Uzuki can steal the personalities of others and also use their abilities. He had done this earlier with Rion Akao, and when facing defeat against Takamura in the Assassin Exhibition of the Century Arc, his mental turmoil drove him to obtain the assassin’s skills.
As a result, right when the death of Uzuki and his allies seemed imminent, he turned the tide by slicing Takamura in half with the assassin's own technique. This was one of the most divisive moments in the fandom, as many believed it was an instance of unfair plot armor granted to the antagonist.
Since it was impossible to kill Takamura through a fair fight, Uzuki’s enigmatic power, borne from his medical condition, gave him a last-second power-up. Regardless of its consistency with the storyline, Uzuki stands as the strongest Sakamoto Days character.
While he was trained as an assassin in the past, he is actively working towards breaking apart the JAA, and hence is not of the same profession as Takamura, Nagumo, and the rest of the cast.
At the same time, the primary reason Uzuki is the strongest in the current story is that he possesses Takamura’s abilities. Therefore, the deceased Phantom of the JAA continues tormenting the main characters even after his death.