Takeda Kousei is the Fifth Head of The Front of Armament. After Kunou Ryuushin retired from the Armament, Takeda at the tender age of sixteen became T.F.O.A.'s Fifth Head which at the time of its creation consisted of only three members, aside from Takeda this included Genba Hisashi and Inada Genji, these three set out to make their own Armament to distinguish themselves from their predecessors, the Fourth Generation's shadow.
On the first night of Takeda's leadership, Genji witnessed an oncoming ambush from thirty members of the HYAKKI motocycle gang coming straight for the Armaments Junkyard hangout, they then furiously faced HYAKKI with just the three of them,. On this night, Takeda's Fifth Generation began. Later Yanagi Shinji joined as the Armament's Fifth Vice Head.
Takeda Kousei is considered one of The Four Kings in his generation and is well respected among his peers like his fellow heavyweights, Suzuran's Zetton and Housen's King Joe, the latter whom he fought privately, though the winner of this fight was never revealed.
In middle school Takeda Kousei was someone that people did not wish to cross, he attended Kajiya Mid and there was no one in the East District who hadn't heard of him . He was a lone wolf who didn't talk much with others, he'd just ride around on his motorcycle all day even though he didn't have a license.
Back In his first year he challenged Murata Juuzou to a fight who at that time was the head of Kajiya Mid, even though he couldn't win Takeda continued to charge Juuzou regardless of the three broken ribs he'd acquired during the brawl .
After this incident no one dared to pick a fight with Takeda Kousei and even speaking his name became a taboo.
In his third year he got into a motorcycle accident which took him off the delinquent scene for quite awhile, although others admit if not for this set back the power of the middle schools in town would have been different .
After recovering from his injuries during the final days of his third year at Kajiya Mid, Takeda was recruited by Murata Juuzou, who now was the Vice Head of The Front of Armament, to become an apprentice under it's Fourth Generation.
After Ryuushin retired he named Takeda Kousei the new leader, and all old members retired with him, lleaving the three alone to take care of the 5th generation. Hyakki, thinking they were weak, went with 20 or 30 members to smash them, but they couldn't finish the Armament.
During the hunt of Kai Gang, Kousei accidentally met with King Joe, Nakajima Shinsuke and Zetton, the so called New Four Kings. King Joe wanted to decide who was the strongest and was going to draw lots to see who was going to fight who, but when Kai's matter was resolved, Kousei and the others left and they didn't fight. King Joe drew lots anyway and discovered he was going to fight against Kousei. He later called Kousei to fight and got his friend Matsuo as a witness, the result of the fight is unknown but both King Joe and Kousei were badly injured.
Kousei grew a strong Armament, but sadly he had mid-level cerebral infarction and had to do a very expensive and high risk surgery . He wanted to wait a little longer and choose a new head but his vice-head Yanagi Shinji called an emergency meeting with the older members and announced that their generation was over, they protested but understood that the new generation had to fight their way.
Kousei got mad because Yanagi decides for him and especially cause he didn't choose a new head yet and Tesshou and Kiyohiro couldn't stand each other, which made him feared that the Armament could break in two, but Yanagi said that whatever would be, would be.
Kousei went to Tokyo do his surgery, the Armament gathered what they could to help with his expenses, as did King Joe, Nakajima Shinsuke and Zetton.
- Kousei vs. Hiruta Masashi - Won
- Kousei vs. Murata Juuzou - Losts 
- Kousei vs. Kai - Won 
- Kousei vs. King Joe - Unknown 
- Kousei, Inada Genji, Yanagi Shinji, Kawaji Koukichi, Murota Kenzou vs. Kuzugami Tatsuo - Lost