Kamen Rider Birth

Kamen Rider Birth (仮面ライダーバース) is the second Kamen Rider featured in Kamen Rider OOO with the identity used by several different people in the series. Chronologically the first user was Nobunaga who used it to battle one of the Pteranodon Yummy and later by Shintaro Goto. It first appeared in the series and to Kamen Rider OOO by Akira Date. The suit's name comes from the English word "birth" and his motifs are gashapon machines, a birthday cake, and a scorpion. Birth's first appearance is in Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core as Nobunaga.

In the Kamen Rider OOO WONDERFUL: The Shogun and the 21 Core Medals, Eiji Hino temporarily used the Birth System to battle against Nue Yummy when most of his Core Medals were taken.

Kamen Rider Birth
Kamen Rider Birth's ending theme is entitled "Reverse/Re:birth".

Birth Driver
The Birth Driver is a transformation belt created by Kiyoto Maki. Unlike Kamen Rider OOO's OOO Driver, the Birth Driver uses one medal instead of three and uses Cell Medals to transform intstead of Core Medals. After a single Cell Medal is inserted into the Birth-Slot (バースロット), and the Grap Accelerator (グラップアクセラレーター) knob is twisted, the belt's Receptacle Orb's Trancer Shield (トランサーシールド) is opened, releasing the energy of the Cell Reactor (セルリアクター) and the wearer is transformed into Kamen Rider Birth. There appears to be an effect when using Core Medals as seen on Magazine scans. After inserting another Cell Medal and turning the Grap Accelerator again, Kamen Rider Birth can summon one of the Birth CLAWs units. By inserting two or more Cell Medals into the belt, Birth can initiate a Cell Burst (セルバースト) attack.

There are two Birth Drivers are debut in TV series: Complete Version and later Prototype Version.

Birth Buster
The Birth Buster is Kamen Rider Birth's primary weapon. It's ammunition comes from O Medals, that converts Cell Medals into energy bullets. Kamen Rider Birth can reload the Cell Medals by using the Cell Bullet Pod (セルバレットポッド). In its Normal Mode (ノーマルモード), it is a gun that uses Cell Medals as ammunitions, firing medal-shaped energy bullets. When Cell Burst Mode is activated, Birth can release the an explosive ball of energy to the target, so long as a Cell Medal has been inserted in it.

Cell Medals
The Cell Medals (セルメダル) are silver O Medals, physical manifestations of human desire that hold tremendous power. Unlike Kamen Rider OOO who uses Core Medals, Birth uses these Cell Medals to transform or access weapons. These Medals can be used to transform into Birth or used in a Cell Burst. No specific Cell Medal is required for Kamen Rider Birth to transform, summon a Birth CLAWs armament, or initiate a Cell Burst attack. Unlike OOO's Core Medals, Cell Medals can only be used once. After said use, their energy is depleted, and they fade away. Also unlike OOO's cores, which can only be destroyed, Cell Medals can be broken, as demonstrated by Uva's shattering Cell Medals to make Waste Yummys.

CLAWs Sasori
When the six Birth CLAWs unites combine, they create the CLAWs Sasori (CLAWs・サソリ), an autonomous scorpion-like assault droid which has its master server and network connection installed in the Birth Helmood allowing whatever move Birth makes for the droid to do the same. It requires 1000 Cell Medals to be summoned, so much it seems almost impossible to fit them all into the Birth Slot in real life and had completely emptied Date's Cell Medal Tank. It is powerful enough to easily overpower even an enhanced Greeed where as Birth alone is powerless against. When out of Birth's range, it can be piloted by another person to control its movement and actions such as OOO. If the CLAWs Sasori is attacked it can separate its pieces then reassemble themselves. Its finishing attack is shooting energy beams from all of the Birth CLAWs that colored based on the color of the CLAWs.

Akira Date's Cell Medal Tank
After Akira Date has been given an task to gather 100,000,000 Cell Medals by Kougami, Akira has just using an milk tank as a container for gathering the Cell Medals.

Shintaro Goto's Cell Medal Backpack
When Akira has been resigned from his position and Shintaro became as second user of Kamen Rider Birth, Shintaro has been given his backpack with the Cell Medal ammos by Kougami.

Candroids
The Candroids (カンドロイド) are special support robots that transform from Can Mode (カンモード) into its Animal Mode (アニマルモード) through the pull-tab on top.
 * The Gorilla Candroid (ゴリラカンドロイド) is a Candroid with a built-in Yummy detection system. The Gorilla Candroid also has superhuman strength and able to throw heavy objects, often used by Date to throw Cell Medals into his Cell Medal Tank. While it can easily detect Yummys, it is unable to detect the Greeed even when out of their human disguises.
 * The Torikera Candroid (トリケラカンドロイド) is a next-generation Candroid developed to utilize the Cell Medal energy more efficiently. It is able to utilize energy that would have otherwise been discharged due to its three Streamagain (ストリーマゲイン) surfaces. It can ram through any obstructing obstacles and its horns can be used to flick medals at targets.