Names：

Masked Rider Black

（Century King Black Sun）
Status： Reformer of Fighting Against Evil（Candidate of Creation King）
Tags： Masked Rider / Kamen RiderMaleCyborg
Owners & Pets： Battle Hopper
Reincarnation： Masked Rider Black RX
Old Enemy： Shadow Moon
Henshin： Kotaro Minami
World： the World of Kaman Riders
LeveL： A

Kohtaro was born on the day of a solar eclipse, along with his stepbrother Nobuhiko Akizuki, within the same hospital. Gorgom noticed this, and both brothers were entitled heirs to their leader, the Creation King's throne. After Kohtaro's parents deaths from an apparent accident, Prof. Akizuki adopted Kohtaro alongside Nobuhiko and Kyoko. On the night of Kohtaro and Nobuhiko's 19th birthday, they were captured by Gorgom and were remade into cyborgs and infused with Kingstones. Kohtaro received the "Stone of the Sun" to become Century King Black Sun. However before they could remove Kohtaro's humanity, Prof. Akizuki intervened, with Kohtaro using Battle Hopper to escape from Gorgom's base.

Pursued by the High Priests of Gorgom, Kohtaro continued to run, eventually getting cornered on top of a building. There, Kohtaro is told by his pursuers of his physical alteration, before being subdued by their attacks. Just as the High Priests began carrying away Kohtaro however, the latter struggled to break free, falling on top of a warehouse.

Kohtaro was born on the day of a solar eclipse, along with his stepbrother Nobuhiko Akizuki, within the same hospital. Gorgom noticed this, and both brothers were entitled heirs to their leader, the Creation King's throne. After Kohtaro's parents deaths from an apparent accident, Prof. Akizuki adopted Kohtaro alongside Nobuhiko and Kyoko. On the night of Kohtaro and Nobuhiko's 19th birthday, they were captured by Gorgom and were remade into cyborgs and infused with Kingstones. Kohtaro received the "Stone of the Sun" to become Century King Black Sun. However before they could remove Kohtaro's humanity, Prof. Akizuki intervened, with Kohtaro using Battle Hopper to escape from Gorgom's base.

Pursued by the High Priests of Gorgom, Kohtaro continued to run, eventually getting cornered on top of a building. There, Kohtaro is told by his pursuers of his physical alteration, before being subdued by their attacks. Just as the High Priests began carrying away Kohtaro however, the latter struggled to break free, falling on top of a warehouse.