Icon-amazons.png This article is about a/an Amazon in Kamen Rider Amazons.

Hajime Hoshino (星埜始 Hoshino Hajime) was a former professor of Jin Takayama, the father of Iyu Hoshino, and one of the first new type Amazons, the Vulture Amazon (ハゲタカアマゾン Hagetaka Amazon).

Character History

Amazon Involvement

Hajime was visited by Jin when Nanaha became pregnant, discussing on how would the baby to be taken care of. Hajime noticed the intention of Jin to kill Chihiro due to his ideals of protecting humanity, and decided to make Nanaha to run away with Chihiro when he was born.

Jin then became mad at Hajime and told him that what he had protected would be what destroyed his family, throwing him to the ground. In the process, Hajime cut his finger on a broken tube containing Chihiro's DNA, which entered his bloodstream. Haruka would later cooperate with Hajime to learn more about Chihiro and human-Amazon hybrids in general.

Transformation Into An Amazon And Death

Despite having discovered the lysogenic nature of hybrid cells, and noting that this is far more prevalent in Chihiro than in Haruka or Jin, he has no idea what the process means and what it does. Hajime eventually found it out the hard way--it turned him into one of the first New Type Amazons without him even realizing it was possible, on his birthday when he was celebrating with his family.

The urge to feed on humans completely took over his consciousness, and he then went on a rampage, killing and eating his family, leaving blood stains and dead bodies of his family everywhere in his house. He was also nearly going to finish Iyu off, dragging her body along with him.

When Kurosaki arrived at the scene, he was seen with blood stains all over his body and eating Iyu's left eyeball. Kurosaki struggled to kill him by shooting him rapidly until Haruka arrived. Haruka then transformed into Amazon Omega and killed Hajime, ending his life once and for all.


Hajime is a caring father and loved to take care of life before becoming an Amazon, as shown when he couldn't kill the innocent unborn Chihiro and cared so much of Iyu and her sister. Tragically, like all new-type Amazons, Hajime lost his mind and gave into his Amazon instincts, slaughtering and killing his family.


  • Amazons
    • Jin Takayama: He was once his mentor and have been both working together on genetic terms. Jin was the one who turned Hajime into an Amazon in an accident.
    • Haruka Mizusawa: Hajime started to befriend Haruka after learning on Jin's situation and trusted Haruka on what would happen to him and his family later.
    • Iyu Hoshino: His daughter. Hajime loved Iyu but because of this, when he turned into an Amazon, Iyu became his first target after he finally lost to his Amazon's nature.

Behind the Scenes


Hajime Hoshino was portrayed by Jun Yamasaki, who also portrayed Toru Hojo in Kamen Rider Agito.


  • Both him and his daughter are bird-type monsters.



Icon-amazons.png Kamen Rider Amazons
Kamen Riders
Haruka Mizusawa - Jin Takayama - Jun Maehara - Chihiro - Einosuke Mido
(Neo) Amazons Driver - (Neo, Militant) Amazons Register - Junglaider
Other characters
Mizuki Mizusawa - Nanaha Izumi
Nozama Peston Service
Makoto Shido - Ryusuke Otaki - Nozomi Takai - Kazuya Misaki - Kota Fukuda - Jun Maehara - Mamoru
Nozama Pharmacy
Reika Mizusawa - Shogo Kano - Yugo Tachibana - Takaaki Tenjo
Team X
Hiroki Nagase - Kenta Kitamura - Takumi Yamashita - Chihiro
Yugo Tachibana - Shogo Kano - Takeshi Kurosaki - Ichiro Fudamori - Kota Fukuda - Iyu Hoshino - Mizuki Mizusawa
Experiment Amazonz
Spider Amazon 1 - Spider Amazon 2 - Bat Amazon 1 - Dragonfly Amazon - Mole Amazon - Queen Ant Amazon - Soldier Ant Amazon - Butterfly Amazon 1 - Butterfly Amazon 2 - Shrike Amazon 1 - Shrike Amazon 2 - Crab Amazon - Bat Amazon 2 - Wasp Amazon 1
Sigma type Amazonz
Amazon Sigma - Crow Amazon
New type Amazonz
Vulture Amazon - Panther Amazon 1 - Stag Beetle Amazon - Rhinoceros Amazon 1 - Snake Amazon 1 - Mantis Amazon 1 - Urchin Amazon - Baboon Amazon - Elephant Amazon - Weevil Amazon - Rose Amazon - Mantis Amazon 2 - Rhinoceros Amazon 2 - Panther Amazon 2 - Snake Amazon 2
Lysogenic type Amazonz
Amazon Neo - Jellyfish Amazon
Livestock Amazonz
Buffalo Amazon - Sea Snake Amazon - Shark Amazon - Snapping Turtle Amazon - Squirrel Amazon - Tiger Amazon
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