This article is about a/an form-exclusive weapon in Kamen Rider Gaim.

"Melon Defender!"
―Summoning announcement via Kiwami Lockseed[src]

"Soiya! Melon Squash!"
―Finisher announcement via Sengoku Driver[src]

The Melon Defender (メロンディフェンダー Meron Difendā) is the Armored Rider Arms Weapon granted either by accessing Melon Arms or via the summoning ability of Kiwami Arms. True to its shield design, the Melon Defender can be used to block attacks, thus leaving the opponent wide open. In addition to being a shield, it has sharp curves and a sharp point on the bottom of the shield which allows the Melon Defender to also act as a melee weapon. It can also be thrown towards an opponent and return like a boomerang.


The Melon Defender consists of the following parts:

  • Tai Inga (タイインガ Tai Inga) - The top section. It is a battery unit that absorbs shock energy and converts it into its own energy. The energy is used as an electromagnetic shield that wraps around the entire Melon Defender.
  • Rainigan (ライニガン Rainigan) - The red jewel. It is a type of mineral that controls the Kanesasumata.
  • Kanesasumata (カネサスマタ Kanesasumata) - The golden stripe running down across the Melon Defender's length. It is an electromagnetic shield oscillator. It is wrapped in a metallic frame and usually functions as armor in its own right. However, it can instantaneously form a magnetic field against opponents' attacks, reducing its power of impact.
  • Hasaishin (ハサイシン Hasaishin) - The bottom pointed unit. It is a blade that can penetrate any hard skin and armor. Its lethality is increased with the user's power and the Melon Defender's weight.
  • Sokutouen (ソクトウエン Sokutouen) - The crescent blades attached to the sides. With enough skill and aim, it can destroy opponents' weapons that it took.

Known Users

Finishing attacks

  • Melou Blast (メロウブラスト Merou Burasuto): After Zangetsu activates his Sengoku Driver's Squash function, he throws his Melon Defender charged with maskmelon-shaped energy at the enemy before slashing them with the Musou Saber.


  • This is the first Arms Weapon to be in the form of a shield, followed by the Apple Reflecter.
    • Unlike the Apple Reflector, the Melon Defender does not come with a sword, though its primary user, Zangetsu, is also armed with the Musou Saber by default.
  • This is the only Arms Weapon that can be used as three kinds of weapons. In this case, a shield, a boomerang, and a melee weapon.
    • First demonstrated by Zangetsu's fight against Armored Rider Kurokage and later demonstrated in Gaim's fight against the Enhanced Over Lord Inves Demushu.
  • The Melon Defender's use as a boomerang projectile shield is similar to Captain America's signature shield.
  • The Melon Defender would evidently also be the Arms Weapon of the hypothetical Zangetsu Arms granted by the Zangetsu Lockseed, which is exclusive to the DX toyline. Indeed, by performing the Au Lait function on the DX Sengoku Driver, the inserted Zangetsu Rider Lockseed makes the announcement, Melon Defender!.


Icon-gaim Kamen Rider Gaim
Armored Riders
TV Series: Kouta Kazuraba - Kaito Kumon - Mitsuzane Kureshima - Takatora Kureshima - Hideyasu Jonouchi - Ryoji Hase - Oren Pierre Alfonzo - Zack - Kurokage Troopers
Movie/Special/Stageshow-exclusive: Bujin Gaim - Ren Aoi - Lapis - Kougane - Touka Akatsuki - Shura - Kugai Kudo - Maja
New Generation Riders
TV Series: Takatora Kureshima - Ryoma Sengoku - Yoko Minato - Lock Dealer Sid - Kaito Kumon - Mitsuzane Kureshima
Movie-exclusive: Peko - Alfred
Rider Gear
Sengoku Driver - Genesis Driver - Lockseeds - Armor Parts - Arms Weapons - Musou Saber - Sonic Arrow
Rider Machines
Sakura Hurricane - Rose Attacker - Dandeliner - Tulip Hopper
TV Series: Mai Takatsukasa - Yuya Sumii - Akira Kazuraba - Chucky - Rica - Rat - Peko - Kiyojiro Bando - Iyo - Kikaider (REBOOT)
Movie-exclusive: Ieyasu - Shu Aoi - Saki Aoi - Shapool - Azami
Beat Rider Teams: Team Gaim - Team Baron - Team Raid Wild - Team Invitto - Team Red Hot - Team Soten - Team Pop Up - Team Spingere - Team Boost - Team Mouryou - Team Severe Beat
Kamen Riders: Takeshi Hongo - Keisuke Jin - Ryo Murasame - Takumi Inui - Momotaros - Tsukasa Kadoya - Shotaro Hidari - Haruto Soma - Shinnosuke Tomari - Takeru Tenkuji - Emu Hojo - Parado - Sento Kiryu - Sougo Tokiwa
Other Heroes: Daigo KiryuIcon-crosswiki - Ressha Sentai ToQgerIcon-crosswiki - Kikaider (REBOOT)

Locations: Zawame - Charmant - Yggdrasill Tower

Yggdrasill Corporation
Takatora Kureshima - Mitsuzane Kureshima - Ryoma Sengoku - Lock Dealer Sid - Yoko Minato - DJ Sagara - Amagi Kureshima
Remnant groups: Black Bodhi - Neo Baron

Zawame City Restoration Bureau

Femushinmu (Over Lord Inves): Rosyuo - Demushu - Redyue - Dyudyuonshu - Grinsha - Shinmugurun - Over Lord Queen
Lapis - Kougane
Other Over Lords: Lord Baron - Tyrant
Advanced Inves: Byakko Inves - Seiryu Inves - Hekija Inves - Shika Inves - Kamikiri Inves - Komori Inves (Mutant) - Inoshishi Inves - Lion Inves - Yagi Inves
Elementary Inves

Helheim (Forest) - Forbidden Fruit - Man of the Beginning - Woman of the Beginning - Femushinmu Planet - Planet of Helheim

Other Villains
Grasshopper Monster - Badan Empire - Pitcher Plant Monster - Megahex - Hakaider (REBOOT)
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