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Masato Mishima is the second-in-command of ZECT who later allies with the Natives in their plot to turn everyone on Earth into Worms and the main antagonist of Kamen Rider Kabuto.

Mishima serves as assistant to ZECT HQ's leader, Riku Kagami. He has no sense of taste, and finishes eating by taking a supplement. He is the one who briefs the ZECT teams about the Worms. Despite often being suspect of his orders, Shuichi Tadokoro and Sou Yaguruma are forced to turn a blind eye to him due to his position in ZECT's hierarchy.

He at one point uses the TheBee Zecter forcefully become Kamen Rider TheBee despite the TheBee Zecter's attempt to reject him. In episode 48, he assumed the form of Gryllus Worm using the pendants created by the Natives.


Kamen Rider Kabuto

In the past, Mishima kidnapped a young boy who would become Dark Kabuto and detained him within a ZECT facility, where he conducted numerous experiments on him to unlock the power of the Hyper Zecter and forcefully converted him into a Native Worm, taunting the boy by mockingly congratulating him for becoming a Native. Mishima also at some point detained Renge Takatori and forced her to eat nothing but boiled rice for many years.

Mishima later attempted to convince Daisuke Kazama to join ZECT, only for the Rider to refuse. In response, Mishima had Shun Kageyama kidnap Kazama's child companion Gon to blackmail him into fighting Kabuto.

With Tendou's continued interference in his plans, Mishima sends out Renge to pose as a cadet and get close to Tendou in order to assassinate him. However, after eating some of Tendou's cooking, Renge begins to grow close to Tendou and is eventually convinced by him to turn against Mishima, later assisting him in stealing the Hyper Zecter. In response, Mishima attempts to destroy the Hyper Zecter with the bomb, but the Zecter survives the explosion and manages to find its way to Tendou.

After Riku Kagami gives a public announcement revealing the existence of Worms to the world and prepares to disband ZECT following the defeat of the Worms, Mishima allies with Negishi and the Natives in their plot to turn all of humanity into Worms. He overthrows Riku Kagami as leader of ZECT and usurps his position. Mishima distributes Worm-detecting pendants created by the Natives to the population of Japan, accusing anyone who doesn't wear one of being a Worm in disguise, all while he and the Natives had secretly modified these pendants to convert their wearers into Native Worms upon the release of a certain signal.

Mishima later uses the Natives' pendants to transform into Gryllus Worm, the strongest Native, and take on Kamen Riders Kabuto and Gatack. He is defeated by Hyper Kabuto's and Gatack's Rider Kick and then destroyed by the meteorite explosion that obliterated the studio set.

Kamen Rider Kabuto: God Speed Love

Masato Mishima appears with a more minor role in the movie, being one of the members of ZECT's inner circle alongside Riku Kagami who has secretly sided with the Worms to construct the Jacob's Ladder station to allow the Next-Worms to invade. He later sends out Issei Kurosaki to stop Kabuto and Gatack when they board the station.

OOO, Den-O, All Riders: Let's Go Kamen Riders

Kamen Rider TheBee 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. Although there is no information on TheBee's human form, since all of the other users of the TheBee Zecter appear in their own separate Rider forms, this incarnation of TheBee could be Mishima, as he somehow appears to have been revived by unknown means.

Kamen Rider × Super Sentai: Super Hero Taisen

The Gryllus Worm is one of Dai-Shocker's Great Commanders. During the final battle between the combined Rider and Super Sentai forces and the Shocker-Zangyack Alliance he takes on the Gokaigers. In the background of both aerial attack scenes, he is first seen fighting NinjaYellow, then ShinkenRed and DekaBlue. His human identity isn't made clear in the movie.

Kamen Rider Wizard

Gryllus Worm was one of Amadum's monsters in the world within the Magic Stone.


He only used the TheBee Zecter only for short period. In the episode of 48 of Kamen Rider Kabuto, he assume the form of the strongest Native Worm, Gryllus Worm.



           Kabuto logo Villains

Zecter Riders
Sou Yaguruma | Shun Kageyama | Tsurugi Kamishiro | Souji Kusakabe

Sails Worms
Executive Worms: Rena Mamiya | Reiji Nogi
Natives: Negishi | Masato Mishima
Minor Worms: Aracnea Worm Rubor | Aracnea Worm Flavus | Aracnea Worm Nigrita | Lanprys Worm | Bellcricetus Worm | Epilachna Worm | Pulex Worm | Verber Worm | Verber Worm Rota | Coleoptera Worm Aeneus | Coleoptera Worm Croceus | Coleoptera Worm Argentum | Musca Worm | Sectio Worm Acuere | Formicaalubus Worm Oculus | Formicaalubus Worm | Formicaalubus Worm Maxilla | Viellis Worm | Sepultura Worm | Tarantes Worm Purpura | Genomyas Worm | Brachypelma Worm Aurantium | Brachypelma Worm Viridis | Geophilid Worm | Acarina Worm | Acarina Worm Amber | Culex Worm | Cammarus Worm | Cochlea Worm | Leptophyes Worm | Subst Worm

Riku Kagami | Issei Kurosaki | Tetsuki Yamato | Next-Worms

           Super Hero Taisen Villains

Shocker-Zangyack Alliance
Leader: Narutaki/Doktor G
Commanders: Apollo Geist | General Shadow | General Jark | General Black | Shadow Moon | Doras | N-Daguva-Zeba | El of the Ground | Orphnoch King | Joker Undead | Nurikabe | Gryllus Worm | Bat Fangire | Alligator Imagin | Llumu Qhimil | Weather Dopant | Mezool
Kaijin: Scorpion Man | Ghoster | Isoginjaguar | KomaThunder | Tiger-Roid | Cyborg Soldier Level 2 | Go-Gadoru-Ba | Go-Baberu-Da | Me-Garima-Ba | Go-Jaaza-Gi | Pantheras Luteus | Stellio Dextera | Brobajell | GuldMirage | Armadillo Orphnoch | Rhinoceros Beetle Orphnoch | Shell Undead | Tortoise Undead | Kasha | Musca Worm | Gecko Imagin | Bat Imagin | Mole Imagin | Medusa Legendorga | Warthog Fangire | Taurus Ballista | Cockroach Dopant | Spider Dopant | Kuwagata Yummy | Uni-Armadillo Yummy
Footsoldiers: Shocker Combatmen | Destron Combatmen | Dogma Fighters

Leader: Rider Hunter Silva
Commanders: Black Cross King | Hades God Cyclops | Hades God Drake | Hades God Sleipnir | Hades God Dagon | Yaiba of Darkness | Gai | Rei | Sea Fist Demon Rageku | Sanyo | Suugu | Long | Miranda | Rairaiken | Yogoshimacritein | Pollution President Batcheed | Doukoku Chimatsuri | Dereputa of the Meteor | Mons Drake of the Planet | Brajira of the Messiah | Deratsueigar | Zatsurig | Warz Gill | Ackdos Gill
Monsters: Shikabanen | Zodomas | Buramudo | Nanonanoda | Bowser | Yokubarido | Stargull | Almadon | Uorlian | Daiyarl | Shieldon | Vannain | Namono-Gatari of the Ortaurus Headder | Bari-Boru-Dara of the Uniberus Headder | Rō-O-Zā-Ri of the Hydrapan Headder | Chinomanako | Nunchaku Banki
Footsoldiers: Gormin | Sugormin | Dogormin

Demon King Psycho's Army
Space Shocker
Leader: Shadow Moon
Commanders: Space Ikadevil | Space Spider Man
Kaijin: Scorpion Man | Saboteguron | Ghoster | Zanjioh | Jaguarman | Girizames | Schwarian | Zu-Zain-Da | Sonorabuma | Buzzstinger Wasp | Arch Orphnoch | Tortoise Undead | Gecko Imagin | Pearlshell Fangire (Blue) | Bat Fangire | Beetle Fangire | Bat Dopant | Beast Dopant | Pteranodon Yummy | Kamakiri Yummy | Ika-Jaguar Yummy | Musca Zodiarts | Scorpion Zodiarts | Sagittarius Zodiarts | Skydain | Groundain
Footsoldiers: Shocker Combatmen | Chaps

Army of Resurrected
Leaders: Demon King Psycho | Space Reider
Members: Rhino Doubler | Lizard Doubler | Zan Vardo | Karateloid | Bulldozerloid | Parabolaloid 2 | Chief of Staff Damaras | Development Technical Officer Insarn | Dyrandoh | Stargull | Sneak Brothers | Dogormin | Doukoku Chimatsuri | Dayu Usukawa | Chinomanako | Nunchaku Banki | Long | Sanyo | Suugu | Sea Fist Demon Rageku | Furious Demon God Gai | Grand Beast Rei | Agent Abrella

Badan Empire
Leader: Generalissimo of Badan
Commanders: Ambassador Darkness | Kamen Rider Fifteen | Llumu Qhimil | General Shadow | High Priest Baraom | General Jark
Kaijin: Scorpion Man | Saboteguron | Ghoster | Zanjioh | Shiomaneking | Poison Lizard Man | Jaguarman | Girizames | Hiruchameleon | Ganikomol | Turtle Bazooka | Marshal Machine | Sword Master Birugenia | Schwarian | Doras | Garai | Suddendas | Bird Dopant | Kamakiri Yummy | Ika-Jaguar Yummy | Shocker Greeed | Chameleon Zodiarts | Libra Zodiarts | Arachne
Footsoldiers: Shocker Combatmen | Destron Combatmen | Combat-Roids | Chaps
Allies: General Schwarz

2015 Shocker
Leader: Great Leader of Shocker
Commanders: General Black | General Shadow | Marshal Machine | High Priest Darom | General Jark | Super Galaxy King | Schwarian | N-Gamio-Zeda | Lobster Orphnoch | Weather Dopant | Sagittarius Nova | Phoenix | Demushu | Roidmude 089
Kaijin: Garagaranda | Cheetahkatsumeri | Zanjioh | Shiomaneking | Poison Lizard Man | Poison Lizard Man | Girizames | Turtle Bazooka | Roidmude 057 | Roidmude 016 | Roidmude 076
Footsoldiers: Shocker Combatmen