Tamakoma First

"Border's strongest unit is already on its way."

- Masafumi Shinoda about Tamakoma First in Chika Amatori 4.

Tamakoma First, also known as Kizaki Unit, is a Border Team. It is led by Reiji Kizaki. Each member has their own unique Trigger, which is different from HQ's Normal Triggers. They are not allowed to participate in the Team Rank Battles due to these Triggers being considered too powerful, and being unapproved Neighbor technology. Shinoda also called them "Border's Strongest Unit." Jin used to be a member of this unit prior to receiving his Black Trigger, although he did not return to it after relinquishing his ownership of Fūjin.

Black Trigger Capture Arc
The members of Tamakoma First are assigned as mentors to Osamu, Yūma, and Chika. They train their pupils in their field.

Large-Scale Invasion Arc
Shinoda sends Tamakoma First to aid Osamu after Kitora is cubified by a Rabbit. It is easily able to deal with the new Trion Warrior, but Hyuse and Viza come along. At this point, the members are forced to split up; Konami chases after Trion Warriors heading towards civilians, Karasuma helps Osamu and Chika flee from the Neighbors while Kizaki faces the two.

Large-Scale Invasion Arc

 * Aftokrator's Invasion: Suppressed
 * Tamakoma First vs. Viza and Hyuse: Loss

Large-Scale Invasion Arc

 * Galopoula's Invasion: Suppressed