Movie
Description
Shinzō Hattori, the younger brother of Kanzo Hattori, is approximately five to seven years old. This ninja-in-training originates from Iga Province and resides with his brother in Kenichi Mitsuba's Tokyo household, where the Mitsuba family cares for him as one of their own. Shinzō possesses a plump build, fair skin, oval-shaped black eyes, and distinctive circular blush marks on his cheeks. He typically wears red ninja robes secured with a white belt and carries a wooden sword on his back.

As a ninja apprentice, Shinzō starts with easily destructible wooden weapons, later advancing to sophisticated steel weapons like swords and shuriken. His notable abilities include specific ninja techniques such as walking on water and flying. He possesses an extremely loud cry capable of stunning or immobilizing opponents and even causing people to faint, though he sometimes uses this disruptively. Demonstrating determination and a strong will to improve, Shinzō often seeks his older brother's help during challenges. Though not matching his brother's prowess, he proves a capable combatant who has held his own against adversaries like Kemuzou Kemumaki.

Shinzō deeply looks up to his older brother but occasionally argues with him, particularly when avoiding rigorous training; their disagreements resolve amicably. He shares an inseparable, playful bond with the ninja dog Shishimaru, experiencing rare and short-lived conflicts. Shinzō maintains a friendly relationship with Yumeko Kawai, who often prepares treats for him. His dynamic with Kenichi Mitsuba is complex; Kenichi sometimes mistreats him yet also relies on him for assistance, occasionally leading to troublesome situations. Shinzō harbors dislike for Kemumaki and his ninja cat Kagechiyo, though instances of cooperation occur, such as Kemumaki teaching Shinzō the water-walking technique.

Combining mischief and loyalty, Shinzō occasionally tricks his brother into giving him items and disrupts others with his loud crying. Despite this, he possesses a good heart, compassion, and a cheerful temperament that helps him form friendships easily. He is sensitive to interruptions during conversations and strives relentlessly to grow stronger as a ninja. His development involves progressing from basic wooden weapons to advanced steel ones and refining his techniques through persistent effort and his brother's guidance.