is a Japanese television drama that aired from April 2, 2008, to March 18, 2009, on TV Tokyo. It was a joint collaboration between WIZ and Production I.G. Takashi Miike oversaw the project. it is described as a science fiction tokusatsu action drama. It was replaced in its time slot by an animated cartoon, Mainichi Kaasan, after it ended. A second series titled was distributed online beginning in May 2009.

Plot Keita Amishima is a high school freshman who gets involved in Under Anchor, an organization formed to bring cyber criminals to justice using advanced technology. Taking the place of a previous Under Anchor agent, Keita is paired up with Phone Braver 7, a cellphone robot. Together, the two track down the high-tech criminals as well as their benefactor, the renegade Phone Braver 01. But in the process, the two learn of a conspiracy within Anchor itself tied to its mysterious ex-agent Magira.

Characters

Under Anchor is a branch of Anchor, a major cellular telephone service provider, that carries out investigative field missions related to data and technology crimes. It created and maintains the Phone Bravers. Anchor has a network supervising system named , which web access and hacking by the Phone Bravers are performed through.

: A high school freshman who preferred not to make new friends in school, but becomes buddies with Seven after meeting his predecessor Takimoto when he was to meet a friend of his at Mt. Fuji, and becomes an Under Anchor agent in training, eventually becoming full-fledged after passing the "Last Day on Earth" simulation. He and Seven were later abducted by Magira and Zero-One with Keita tested with Seven's life on the line by going to every place to every major event he's been to since being Seven's partner, playing in Magira's plan to induce another Parallel Decentralized Link. Though chained up, Keita manages to convince Zero-One to spare Seven. As a result, Keita initially attempts to take Zero-One under his care, only for the Phone Braver to suddenly leave him with a text message revealing a possible mole within Anchor (later revealed to be Yuto Date). Regardless, Zero-One has taken Keita up on his offer and visits his house on occasion for recharges and also to cause general mischief. : Buddied with Third, Kirihara comes off strong and hard on others, especially Keita. He is a former police officer. Although he hates technology, he joins Under Anchor to be proven wrong about his feelings towards it. Kirihara was banned from missions for one month after the Parallel Decentralized Link incident, after which he was reinstated. His parents and younger brother were killed 13 years ago by phantom killer named Akatsuki. He is a secret fan of Hitomi Shimatani, and is jealous when he sees Seven receive a kiss from her. : Seven's original buddy, a level-headed investigator with feelings for Chigusa. He is mortally wounded when attempting to save Keita during a case. Seeing something of himself in Keita, he hands Seven over to him before dying due to his injuries. Keita eventually joins Under Anchor after the incident, seeing Sōsuke as his initial inspiration. : Head of the special investigation team of Under Anchor and former buddy of Phone Braver 2 until she is scrapped by 01. Chigusa is very serious with her missions and work. When Tada resurfaced, Mimasaka is forced to team up 01 to stop save Keita, making her peace with him as a result. : An agent of Under Anchor, a lively girl who is Phone Braver 4's Buddy and oversaw Keita when he was a trainee. Tōko is also a romantic type, although she seems to jinx everyone around her whenever she's in love and gets them involved in her affairs. : Appeared in Sōsuke Takimoto Case File. Buddied with Roku, an agent who belongs to the overseas branch of Under Anchor and is active mainly in Europe. He is a big man topping 2m, but he is stoop-shouldered and looks unreliable. He is a former member of the SAS. : Head of the development team of Under Anchor, in charge of repairing damaged Phone Bravers. Usually friendlily called by members of Anchor, Mito was the man who brought Date and Sōda together and played a part in the Phone Braver concept when inspired by a girl named Yuuri. He is also the one who created the alien invasion-like training exercise called "The Last Day on Earth" as a means to initiate new agents. He is a fan of Hitomi Shimatani. : A member of the development team of Under Anchor. She is a very cheerful and upbeat girl who helps keep the Phone Bravers well-maintained. : A member of the development team of Under Anchor Tech. She seems to have shown an interest in Hirofumi. : A member of the development team of Under Anchor Tech. : A member of the development team of Under Anchor Tech. : A member of the development team of Under Anchor, usually called by fellow Under Anchor members. Formerly an asocial tech-whiz who was found by Mito at a Nation High School Robot Contest and a fan of the superhero manga Silverman, Kikai-kun is the one who built the Boost Phones, their abilities based on the manga. Though he saw the Phone Bravers as mere machines, his meeting with Keita changes his views and he wishes to understand Keita. He was also involved in an incident in which he was framed for stealing copies of some rare Silverman manga, when in reality, it was another man who dressed up as Hirofumi and used face-modeling technology to doctor the surveillance video to make him look like he did it. He was able to clear his name with Keita and Seven's help, and also seems to have shared a mutual interest with Mutsuki Sakaki. : An operator of Under Anchor. : An operator of Under Anchor. : An operator of Under Anchor. : An operator of Under Anchor. : An operator of Under Anchor. : An operator of Under Anchor. : Advisor of Anchor, he was the one who set up the robotics concept of the Phone Bravers. He was installed as the CEO as the successor to Sōda. He betrays Under Anchor by helping to develop Gene alongside Magira but was deceived by Magira. : CEO of Anchor, providing the AI system used by the Phone Braves. Taking the blame of the event caused by Magira and Zero-One, he resigned as Anchor's CEO, but would retain his duty as leader of Under Anchor.

Phone Bravers The are small robots created by Under Anchor, able to transform into cellphones and link up to anything from machines to the Internet. Only seven have been made and given a human who protects the Phone Bravers while in a defenseless position. The reason for the small number of Bravers is due to their ability to execute , which is considered a dangerous but powerful ability, as it can combine the Phone Bravers' AI, enhancing their consciousness and possibly turning the combined 'entity' against humanity. The act was committed three times with the actions behind the first one a mystery. The Phone Bravers are all modeled after the SoftBank 815T.

: Called , a "by the book" sort and latest Phone Braver to be created, colored silver. His model number is PB-CMP-TEST07. Originally buddied with Takimoto, Seven gains a new buddy in Keita Amishima and makes it his duty not to have Keita suffer the same fate as Takimoto. His biggest pet peeve is being thrown into the air, usually yelling "Cell phones are not for throwing!". In some Internet circles, he is known as "Angel-K", a walking cellphone thought to ward off the supposed curse brought on by Zero-One. Seven is strong enough to take down four grown men on his own, as was demonstrated when he was angry at being thrown around like a toy by members of the Kantō Denryūkai. : Appeared in Sōsuke Takimoto Case File. Called and buddied with Blackbird, colored green with an arabesque design. He is a character like an Edokko. He is the only Phone Braver who is actively working while not officially registered yet. He is the same model as Seven, and his model number is PB-CMP-TEST06. : Called , colored brown. Its model number is PB-CMP-TEST05. Although it was under development as a mass-produced type Phone Braver a year ago, it was broken by Zero-One when he took its Lambda Chip, tied to the Lambda Abstract, but it was developed as with the same structure as Five by Magira and Date. : Called and buddied with Tōko, colored pink and model number PB-CMP-TEST04. She is of the same model as Third and similar to her partner in personality, only more flighty. While attempting to stop the Under Anchor hacking a year ago, her program was frozen by Zero-One's virus, shutting her down and leaving her in Maintenance since. : Called and buddied with Kirihara, colored blue, model number is PB-CMP-TEST03. He is a kind, caring character compared to his Buddy. A year ago, while attempting to undo the virus caused by Zero-One, he fearfully refused to support Second out of fear of being corrupted by Zero-One's attack. He eventually overcame his fear to be more active in stopping Zero-One, ending up in Maintenance for a short time after executing a flawed Parallel Decentralized Link with Seven. He later pulled off the same stunt to trace Seven, linking with Zero-One in the process. Another incident with Third occurred when he had suddenly forgotten Keita, who was forced to obtain e-mail addresses of all of his acquaintances in order to restore his memory. In reality, it was Magira who caused the incident and took Keita out of Third's memory as a test. : Called , the first test model and buddied with Chigusa, colored gold and model number PB-CMP-TEST02. She was rolled out with Zero-One on the same day, her mobility damaged when he ran off. Though she attempted to protect the Under Anchor network, Second was broken in two by Zero-One. Her body was returned to Chigusa a year after the incident. : Called , he is the prototype Phone Braver whose model number is PB-CMP-PROT01. Zero-One become a rogue after failing to take the pain of losing three partners (, , and ) changed him, causing him to bitterly run off, injuring Second in the process. Two months later, Zero-One attempts to hack the Under Anchor facilities in order to find a human to answer his reason for existing, damaging three Phone Bravers before running off. After using hi-tech criminals for his own affairs to understand why he exists, often abandoning them when they fail to answer him, he manages to find an almost ideal Buddy in Magira, though the Magira is more of a benefactor that he turns too if damaged or they formulate a plan together. The actions of Zero-One were spoken of in some Internet circles, gaining the name of "Devil-K", who, according to urban legend, brings about a lethal curse to any who witnessed him. However, Zero-One develops an obsession with Seven and Keita, wanting to understand their concept of a Buddy. After meeting a blind girl named Junko Kakeuchi whose story made him curious to understand her forgiving nature towards the man who caused her blindness and the concept of "time" she gave him, Zero-One aided Magira in abducting Seven to use him in a scheme to hack Eliza again and cause a massive blackout worldwide. However, after seeing how far Keita would go for Seven, Zero-One gives up and frees Seven. Though he was offered to live with him, Zero-One leaves Keita while revealing the true enemy is within Anchor itself. Overtime, 01's change of heart is noticed by Under Anchor, explaining it because of Keita and Seven, vowing to protect should Magira take his schemes too far. : Called . He appears in the sequel series K-tai Investigation 7: Next. His model number is PB-S-NEXT-0# and was created by Under Anchor's Space organization called Answer for their space project.

Boost Phones The are attachment robots created by Under Anchor and are in Eliza usually. The Phone Bravers can attach the Boost Phones unto themselves to increase their abilities depending on the crisis at hand as well as the ability needed. The Boost Phones may also be used independently of a Phone Braver for some functions.