Fictional character biography
Nobuhiko Akizuki (秋月 信彦 Akizuki Nobuhiko?, portrayed by Takahito Horiuchi) was born on the day of a solar eclipse alongside his stepbrother Kohtaro Minami, revered by the Gorgom as the heirs to their leader's throne: the Century Kings "Shadow Moon" and "Black Sun". Raised together, the two were like brothers. Once the two were of the ideal age, Gorgom captured them and infused them each with a King Stone. While Kohtaro manages to escape with his memory intact, Nobuhiko's mind was wiped clean while left in a state of suspended animation before being finally reborn as Shadow Moon through the Stones of Earth, Heaven, and Sea. Shadow Moon sets up his regime as a general of Gorgom, serving as Black's nemesis and forcing him to fight him so he can become the new Creation King. In their final battle, Shadow Moon is weakened by Kamen Rider Black after the Satan Sabre is used to slash his King Stone. Though he appears to die after being left inside the Gorgom headquarters when it explodes, Shadow Moon returns years later to seek revenge against Kohtaro, who is now Black RX. However, he lost all of his memories related to Gorgom after its destruction. He is finally defeated by Black RX when he thrust the Revolcane through Shadow Moon's King Stone, destroying it once more. He turns back into Nobuhiko, renouncing his evil ways as he saved two children trapped in the explosive lava, shortly before he dies.
In all of Shadow Moon's appearances, he is voiced by Masaki Terasoma, including the 3D short film Kamen Rider World as the main antagonist and the 40th anniversary film OOO, Den-O, All Riders: Let's Go Kamen Riders as a member of Shocker. Shadow Moon also appears in crossover films Kamen Rider × Super Sentai: Super Hero Taisen as a member of Dai Shocker and Kamen Rider × Super Sentai × Space Sheriff: Super Hero Taisen Z as a leading figure in Space Shocker.
The King Stone (キングストーン Kingu Sutōn?) is Shadow Moon's transformation belt. Embedded upon the center his belt is a green stone called the Stone of the Moon (月の石 Tsuki no Seki?). Through this stone, Shadow Moon can telepathically communicate with Kohtaro via his own King Stone.
The Satan Sabre (サタンサーベル Satan Sāberu?) is a weapon created for use by the Century Kings. Though Bilgenia took it, Shadow Moon reclaimed the weapon and took it as his own. He lost it to Black during their final battle.
The Shadow Sabers (シャドーセイバー Shadō Seibā?) are pairs of long and short swords manifested by the King Stone, this weapon was used as replacement for the Satan Sabre.
Battle Hopper (バトルホッパー Batoru Hoppā?) is a living motorcycle created by Gorgom, made specifically for the upcoming Creation Kings Black Sun and Shadow Moon. Battle Hopper was later stolen by Shadow Moon via his Shadow Flash before Black used his King Stone Flash to free him from Shadow Moon. As a result, Shadow Moon attacks Battle Hopper with the Satan Sabre and the Bike soon dies.
Reception and merchandise
Shadow Moon is one of the few villains in the Kamen Rider Series to be given an action figure, a Souchaku Henshin figure, a S.I.C. figure and a S.H. Figuarts figure. He is also one of the few Kamen Rider villains to have a Rider Kick, without being a Kamen Rider himself. Shadow Moon was also featured as the first Secret Rare card in the Rangers Strike Masked Rider Expansion Vol. 1 and the only character in the Dark Alliance group in the Masked Rider Expansion Vol. 1.
Appearances in other Kamen Rider Series media
An alternate version of Shadow Moon appears in the film Kamen Rider Decade: All Riders vs. Dai-Shocker named Nobuhiko Tsukikage and portrayed by Ryuichi Oura. He is depicted as using Tsukasa's sister to his own benefit during the film to become the leader of Dai-Shocker, though she ultimately turns on him. After knocked into the Dai-Shocker fortress's emblem by Kamen Rider Double in a hit and run, Shadow Moon is destroyed by every main Kamen Rider in the franchise up to Decade all execute their signature Rider Kicks to destroy both him and the building.
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