Masato Kusaka

was a member of Ryusei School who was capable of wearing the Kaixa Gear without disintegrating afterwards and the Gear's primary wearer as .
==History==
===Kamen Rider Faiz===
Ever since being killed and revived by the Dragon Orphnoch, Kusaka had a history with Orphnochs which fueled his hatred for them. While originally acting friendly towards Takumi Inui, he eventually showed his true colors and his motives were revealed.
Kusaka is the only one to have worn all three of the Kamen Rider belts (Faiz, Kaixa and Delta). He wore the Faiz Gear to trick Yuji Kiba. He wore the Delta Gear to battle the Beetle Orphnochs (Rhinoceros and Stag).
Kusaka had a great deal more Orphnoch DNA implanted into him, allowing him to use the Kaixa gear safely for a time, but near the end of the series, it began to wear off, and using the Kaixa Gear was becoming increasingly harmful to him. In the end, his neck was snapped by Yuji Kiba, who claimed the Kaixa Gear as his own towards the end of the series and dies after all of his Orphnoch DNA ran out causing himself to disintegrate into dust with Takumi and the others being unaware of his death until later when his picture of a young Mari was found. Despite disliking Kusaka's attitude, Takumi showed sorrow for him, understanding that he was in a sense, also a victim of misfortune.
==Post Series and other events==
===Kamen Rider Decade===
====Rider War====
Kaixa was one of the many Kamen Riders who fought in Rider War against Decade appears at the beginning of Episode 1 of Kamen Rider Decade . In a dream or vision of Natsumi Hikari, along with other Riders who were going to attack Decade, using his Side Basshar to attack Decade, but it was in vain, so he was defeated along with other Riders, leaving Kuuga as the only survivor, and then conclude the dream with a clash of blows Decade and Kuuga definitively.
====The World of Kuuga====
Kamen Rider Kaixa with the other Riders appears when Natsumi remembers her dream of the Rider War, the dream ending with Decade and Kuuga's clash.
====Second Movement ♬ Prince Kiva====
In Decade, Kaixa is a wildcard Kamen Rider who attacks Decade after he is taken to another world by Kiva-la. He is under the impression that Decade is a hindrance to his own agenda and seeks to take the Decadriver from him.
====The Biting King's Qualifications====
As Tsukasa is fighting against Kaixa in another dimension, the Beetle Fangire defeats Wataru and becomes the new Fangire king, claiming Kivat, He eventually concedes when Decade is returned to the World of Kiva.
====The Destroyer of Worlds====
Kamen Rider Kaixa reappears briefly in later airings of the series finale, using his Side Basshar to attack Decade and Wataru's group. He is seemingly killed in the chaos afterwards alongside many other Riders. In Kamen Rider Decade: The Last Story, Decade is shown to hold a Side Basshar card, labeled as a Kaixa card. Kaixa was presumably restored with all the other Riders after the destruction (and subsequent revival) of Decade ended the Rider War and the worlds were restored, though how he was still alive in the first place considering his fate in 555 is unclear.
====10th Anniversary Project: Masked Rider LIVE & SHOW====
Kamen Rider Kaixa appears summoned alongside other secondary Kamen Rider Riders participating in the musical of Kamen Rider Diend.
===OOO, Den-O, All Riders: Let's Go Kamen Riders===
Kamen Rider Kaixa was part of a group of reinforcement riders led by Akira Date/Kamen Rider Birth to aid the primary riders in defeating the Rock Great Leader. All the Kamen Riders got on their bikes and performed the All Rider Break attack which destroyed the Great Leader.
===Kamen Rider Taisen===
In Takumi's altered memories, at an unknown point of time, Kusaka as Kaixa fought the Horse Orphnoch, however he got himself killed while Faiz battled the Arch Orphnoch. Overpowered by the Horse Orphnoch and getting knocked out of his transformation, the Horse Orphnoch then threw a fireball at him to finish Kusaka off. Desperately reaching for the Kaixa Gear, he couldn't move anymore due to his burns and injuries. Faiz went to his side with Kusaka complaining on why Faiz survived while he had someone to protect. Crying out for life, he disintegrated.
Years later, while the Kamen Riders were fighting Badan, a spirit disguised as Kusaka appeared before Faiz and taunted Takumi into his feelings of guilt, having the Rider interfere with Wizard and X. However Keisuke and Haruto convinced him to move on as the spirit started to disappear.
===D-Video Special: Kamen Rider 4===
====Duel! The True Identity of Shocker's Great Leader====
Though not making a direct appearance, Takumi mentions Kusaka at one point, questioning what he, Kiba, and everyone else would do if they were in his situation.
===Kamen Rider Ghost: Special Event===
===Kamen Rider Heisei Generations Forever===
Kamen Rider Kaixa appears as a toy, when Sento Kiryu and Sougo Tokiwa they find Ataru Hisanaga he brings them to his room which is filled with Kamen Rider memorabilia, with Sougo and Sento stunned to see toys of themselves. Ataru reveals that Kamen Riders are fictional.
===Kamen Rider Gotchard VS Kamen Rider Legend===
==Appearances in other media==
===OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~===
====Type12. - Quietly Listen! Secret of the 26 Secrets!====
Kamen Rider Kaixa appears with Ryuki, Drake, and OOO Sagohzo Combo. According to Sieg, Kaixa is considered by Sieg as a least compatible match.
====Type26. - Peppers! Are You an Ondouragian?!====
Kamen Rider Kaixa appears with Exceed Gills, Black, and OOO Sagozo combo. According to Momotaros, Kaixa is considered a least compatible match .
====Type30. - The Naked, Strong Lucky Food!====
Kamen Rider Kaixa appears with Ouja, Kabuto, and Armed Hibiki. According to Momotaros, Kaixa is considered a perfect boyfriend in a romantic relationship.
====Type44. - Quietly Listen! Underwear, Myself and Underwear====
Kamen Rider Kaixa appears with G4, X, and TheBee Masked Form. According to Sieg, Kaixa is considered by Sieg an OOO's best friend.
===Stage Show===
====Kamen Rider 555 Stage Show at Super Hero New Hero Legend====
In a stage show where Kamen Rider Faiz and his allies are seen fighting their usual foes, Hakaider & Kamen Rider Ouja show up and ends up defeating him, , , , Kikaider, Kikaider 01, Inazuman, , , , Kamen Rider Ryuki, Kamen Rider Knight, Kamen Rider Zolda, and Kamen Rider Kaixa arrive to assist Kamen Rider Faiz.
==Video Game appearances==
===Kamen Rider 555 video game===
Kamen Rider Kaixa is playable along with Faiz and Delta in the Kamen Rider 555 video game.
===Kamen Rider Battride War series===
====Kamen Rider Battride War====
Kaixa is introduced as one of NPC allies character.
====Kamen Rider Battride War II====
Kaixa is one of selectable summonned assist only Riders in Kamen Rider: Battride War II.
====Kamen Rider: Battride War Genesis====
Kaixa made his playable debut in Kamen Rider: Battride War Genesis.
On September 13, 2015, Kohei Murakami announced that he reprise his role as Kaixa in this video game onwards.
In this game, Kaixa's default playstyles is one of the well-round character to pick. However, when using his unique limited power up called Cursed Belt Mode, Kaixa sacrifices a small half of super meter in 20% (Starting Level) > 15 (Level 25) > 10% (Level 30 onwards) each level ups to utilize a powerful version of his special moves. He can also activate Cursed Belt Mode while during a normal attack string combo before performing a certain special move.
Due to Kaixa not having a final form, he is rides SB-913V Side Basshar Battle Mode as his final mode. Like Kamen Rider Birth·Day in this final state, Side Basshar Battle Mode also cannot jump or guard unlike in TV series for some reason, as well as sacrifices amount of super meter when using Transportation Mode or Tag Partnered Double Rider Kick.
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===Kamen Rider Battle: Ganbarizing===
Kamen Rider Kaixa is a playabled character in Kamen Rider Battle: Ganbarizing.
===Kamen Rider Buttobasoul===
Kamen Rider Kaixa is a playable character in Kamen Rider Buttobasoul.
===Kamen Rider Battle: Ganbaride===
Kamen Rider Kaixa appears as a playable and support character in the video game Kamen Rider Battle: Ganbaride.
g8914655.jpg|Kamen Rider Kaixa card
===Battle Spirits ===
Kamen Rider Kaixa appears with other Kamen Riders and Monters in Battle Spirits.
Kaixa Battle Spirits Cards Included
*Kamen Rider Kaixa (Rare)
*Kamen Rider Kaixa (X-Rare)
===Kamen Rider City Wars===
Kamen Rider Kaixa is a playable character alongside the other Kamen Riders in Kamen Rider City Wars. 
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====Senki Zessho Symphogear XD Unlimited====
to be added
==Personality==
Kusaka is a highly troubled person. Having been forced to live in an orphanage where he was constantly bullied by others, alongside Smart Brain's cruel actions had caused Kusaka to develop a psychotic personality of sorts. Holding an intense hatred towards Orphnochs, he became convinced that they would eventually all become threats to humanity, thus making it his mission to be their executioner. 
In general, Kusaka acts politely towards everyone, except for Takumi. This, however, is a facade to hide his true nature as a self-serving, spiteful, vindictive, and skilled manipulator who has no qualms of driving a wedge between Takumi and those around him like Kiba so he can have Mari for himself. This is to the extent of putting Takumi in potentially life-threatening situations at times, not caring whether he caused a person to die. 
Kusaka will join any physical routine for testing his strength and often to lap his palms before and after exercising. The reason for this habit is due to being traumatized on the night when he and his fellow students were attacked by Smart Brain, where he had his hands covered with Mari's blood before being killed himself. 
Despite his very cruel attitude towards Orphnochs, Kusaka is shown capable of some care for others, if moderately in a twisted manner of sorts. Outright stating that he sees Mari as the mother he had always longed for since childhood, Kusaka is very protective of her, being vindictive against those who harm her. 
Aside from Mari, Kusaka displays a level of kindness towards Keitaro and his fellow Ryusei students, due to the time he has spent with them. Furthermore, even after knowing of Hanagata's identity as the Goat Orphnoch, Kusaka clearly felt conflicted at killing the man that he sees as his father, as well as being saddened when he actually did die. 
While far from a noble figure, Kusaka did have some morals, at least in regards to his role as a protector of humanity. Alongside his actions as Kaixa, he begrudgingly allowed Takumi and other ally Orphnochs to fight alongside him, if showing little regard to their safety. Another notable aspect is his concern for fellow humans, telling nearby bystanders to run whenever fighting an Orphnoch. 
Tragically, Kusaka's complete inability to overcome his painful past becomes his fatal flaw, slowly causing him to slowly destroy his body from using the Kaixa Gear, before getting murdered by his sworn foes.
==Fighting Style==
Training himself to fight against the Orphnoch force, Kusaka became a highly athletic individual, acting as team captain for the tennis club, fencing club, and horseback riding club of his university. Though capable as both a long-ranged fighter and short-ranged fighter, Kusaka is shown to prefer close-quarter combat, unless piloting his Side Basshar. 
==Forms==
==Equipment==
===Devices===
*SB-913B Kaixa Driver - Kaixa's transformation device.
**SB-913P Kaixa Phone - A sideflip "swing" cellphone device.
***Kaixa Mission Memory - A small metallic card key containing the information of the Kaixa Armor.
*SB-555B Faiz Driver - Faiz's transformation belt.
**SB-555P Faiz Phone - The control unit of the Faiz Gear.
***Faiz Mission Memory - A small metallic card key containing the information of the Faiz Armor.
*SB-333B Delta Driver - Delta's transformation device.
**SB-333P Delta Phone - The walkie-talkie-shaped control unit of the Delta Gear and the first half of the Delta Blaster.
**SB-333DV Delta Mover - The digital camcoder-shaped viewscreen and the second half of the Delta Blaster.
===Weapons===
*SB-913C Kaixa Shot - Digital camera-shaped knuckle-duster.
*SB-913B2 Kaixa Pointer - binocular-shaped pointer which enables to produce an energy drill deathblow.
*SB-913X Kaixa Blaygun - A special weapon that is both a pistol, a dagger and a lightsaber.
*SB-555C Faiz Shot - Digital camera-shaped knuckle-duster.
*Delta Blaster - The combined form of the Delta Phone and Delta Mover and Delta's main weapon.
**Delta Mission Memory - A small metallic card key which stores the information of the Delta Armor
===Vehicle===
*SB-913V Side Basshar - Kaixa's sidecar motorcycle that can transform in a robot-like Battle Mode.
==Legend Rider Devices==
==Relationships==
===Allies===
*Mari Sonoda: to be added
*Keitaro Kikuchi: to be added
*Rina Abe: to be added
*Syuji Mihara/Kamen Rider Delta (IV): to be added
*Hisao/Mosquito Orphnoch/Kamen Rider Delta (VIII): to be added
*Yuto Sakurai/Kamen Rider Zeronos: to be added
*Shinnosuke Tomari/Kamen Rider Drive: to be added
===Enemies===
*Takumi Inui/Kamen Rider (Next) Faiz: to be added
*Yuji Kiba/Kamen Rider Orga: to be added
*Yuka Osada/Crane Orphnoch: to be added
*Naoya Kaido/Snake Orphnoch: to be added
*Orphnoch King: to be added
*Lucky Clover: to be added
**Kitazaki/Kamen Rider Delta (II)/Dragon Orphnoch: to be added
==Behind the Scenes==
===Portrayal===
Masato Kusaka is portrayed by . As a child, he is portrayed by . He later portrayed in and in . As Kamen Rider Kaixa, his suit actor was .
===Dub names===
In the Korean dub of Kamen Rider 555 entitled Masked Rider Faiz (가면라이더 파이즈 Gamyeon Raideo Paijeu), which aired in South Korea, Masato Kusaka is renamed Sabino Kusaka (구사카 사비노 Gusaka Sabino). Ironically, his Korean dub name happens to be shared with a group of horses, not to mention, he gets killed by Yuji Kiba, the Horse Orphnoch.
===Memes===
*A recurring element in Kamen Rider 555 involves various scenes where Masato Kusaka displays a disturbing smile, revealing his sinister nature. This has been coined by fans and Kohei Murakami as the . The character would continue to perform this smile across various post-555 content such as Zi-O episode 6.5 and Kamen Rider 555 20th: Paradise Regained.
**According to Murakami himself, the Kusaka Smile was inspired by 's performance in .https://www.youtube.com/watch?v=WKmonTTva44
*A meme holiday many Kamen Rider fans on the internet partake in is called "Kaixa Day", which takes place on September 13 (A play on the Kaixa Phone's transformation keycode [9-1-3]). The fans partake in a celebration of what an "irredeemable jerk" Kusaka is and do various posts on forums that make fun of or celebrate the character.
**To commemorate the said day, on September 13, 2015, Kusaka's actor Kohei Murakami appeared as a guest in a Kamen Rider outdoor stageshow to show off his transformation pose dedicated to his fans.
**Furthermore, the Complete Selection Modification Kaixa Gear started its pre-orders on September 13, 2017.
**Kamen Rider 913 is a manga adaptation focusing on Masato Kusaka's character was announced on September 13, 2019.
**Kohei Murakami would release a cover of himself singing Existence ~KAIXA-nized dice on September 13, 2020. The cover art for the single depicts him as Kusaka wearing his signature grin.
**On the Masahiro Inoue's channel, together with Kohei Murakami, the two released a cover of Justiφ's in September 13, 2023. In the same day, the new form of Kaixa for the upcoming movie, Next Kaixa was revealed.
===Conception===
==Notes==
*Masato Kusaka is the only character in the series to use all 3 Rider Gears at least once, becoming three different Kamen Riders.
*The original plan was for Kusaka to meet his demise in the final arc. Actor Kohei Murakami consulted with writer Toshiki Inoue about his character's fate. When Inoue asked whom he wouldn't want Kusaka to be killed by, Murakami chose "Kiba," resulting in the character's demise at his hands. Murakami later admitted regret for his honesty, feeling he should have suggested either Takumi or a dramatic showdown against Hanagata and Kitazaki instead.https://twitter.com/kohei__murakami/status/1687820046838697984http://www.kameradi.toeiad.co.jp/news/20131219.html
==Appearances==
==External Links==
*Masato Kusaka on Kamen Rider Official
*Kamen Rider Kaixa on Kamen Rider Official
*Kamen Rider Delta on Kamen Rider Official
*Kamen Rider Faiz on Kamen Rider Official
==Navigation==
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