From Seven Seas:

Tor Kokonoe has entered the prestigious Koryo Academy, a high school dedicated to training its students to wield Blaze―individualized weapons that a student manifests. The future of a student is often shaped by the form their weapon takes, and when Tor’s appears as a shield, suddenly he’s the odd man out. But that’s when the Duo system comes in, a program where students are paired up. Teamed up with a silver-haired girl named Julie Sigtuna, Tor’s adventures at Koryo Academy are just beginning!

Long ago, a powerful demon lord ruled over the people until an equally powerful hero rose up to defeat him. To counter future threats, Rosewood Academy, a school for heroes-in-training, was created. Today, Rosewood Academy enrolls only the best of the best, and Arnest Flaming is the best of them all. The top student in the school, a dutiful girl nicknamed "Empress of Flame," she has an irritating encounter with a light-hearted boy in the school hallway one day who seems to equal her powers, though she's never seen him before. He introduces himself only as Blade, and Arnest soon finds out not only is he transferring into the school as a new student, but she is personally requested by the King to help him settle in to daily life in Rosewood Academy.

When the Fullmetal Knights Chevalion defeated the Death Universe, peace returned and the Chevalion members returned to their normal daily lives. Well, except for their leader, Retto. For some reason his suit won't come off. So he's stuck as Chevalion Red, and he has problems controlling his powers.

Don’t mess with Ayu – she’s one of the top-ranked Karate club members in the region, although she does have one weakness; snakes. After one fight where she is unconscious because her opponent knows her weakness, and old friend shows up, a young man named Shunpei. He used to be a weakling, but now he may be even stronger than Ayu!

From MangaHelpers:
Finding himself in a war torn Japan that has just lost the war to the US, Zaji wanders the land that used to be a city. Suffering from amnesia, the only thing that he remembers is that he has to remember something important. He quickly learns that he has incredible martial arts combat skills and is able to use it even if he doesn’t realize. It since it seems that it has been engrained into his body through years of training. He is taken in by Gin, the owner of the local bar which occupying US soldiers frequent. Zaji learns the full extent of his strength as he tries to protect the helpless in a devastated society.

From Manga-Sketchbook:

In the previous "Kung-Fu Boy" series, Chinmi became the master of Kempo at Dairin temple, where he trained disciples. When they lose contact with Kyorinji, a temple of the same sect, Chinmi is dispatched to the Kanan Autonomous region to investigate.

He tries to enter Kanan with Pushin, a swordmaster whom he met traveling to Kanan. But they are attacked after trying to enter Kanan and pursued by the Border Police who chase them into a waterfall. A fisherman saves them and aids their entrance into Kanan. The people of Kanan are forcibly oppressed by the government. Chinmi befriends the people and makes the big decision to free them with his Kempo. Sorabi Boru, Lieutenant of the Border Police and Jirai, the evil king of Kanan attack Chinmi...

Mutsu enmei-ryu is an unarmed style that allows the user to defeat any number of armed opponents using incredible speed and strength.

Shura no Toki tells about some Mutsu generation and their important role in history.

1st arc: Yakumo Mutsu (Musashi Miyamoto era) - Vol1

2nd: Izumi Mutsu (Ryoma Sakamoto era) - Vol 2 & 3

3rd: Azuma Mutsu (Izumi's younger brother) -Vol 4

4th: Takato Mutsu (Tokugawa era) - Vol 5 & 6

5th: Kiichi Mutsu (Yoshitsune Minamoto era) -Vol 7, 8, 9 and 10 (elex edition)

6th: Tatsumi Mutsu, Komahiko and Torahiko (Oda Nobunaga Arc) - Vol11,12,13

7th: Tenpei Mutsu (Shiro Saigon Arc) - Vol14

8th: Sakon Mutsu (Raiden Tameemon Arc) - Vol 15

A rising boss in the underworld is forced to lead a double life as a police officer and a gang boss in order to find the killer of his brother.

Completed printed version
Author remade the series at Lezhin

Lezhin Publication