The "love, revenge, and slight euphoria" story centers on a young man who swears revenge against the yakuza. He studies the art of the "assassination fist" with all his might, and becomes an adult. But this man who is a genius at his martial art form realizes his techniques cannot actually be used to kill anyone.

Mounted warriors line up and rush to the assault. Brandishing swords on horseback, the warriors slash at each other... This kind of image of feudal combat is all a lie. Well, then, how did Samurai really fight? A declaration of war has now been made against the lie of combat that was forged during the Edo period, and continued uncontested to this very day.

10 years after the killing of Oda Nobunaga, allegedly through the betrayal of his follower Akechi Mitsuhide, Nobunaga's 16-year-old daughter is being sent to the current ruler of Japan, the cruel Toyotomi Hideyoshi. En route, she is rescued by two mysterious, powerful monks. Her mistrust of their intentions only deepens when she learns that one of them, who calls himself Tenkai, possesses one of the powerful weapons known as "Sodomu." Tenkai's plans will only become clear when his secrets are revealed! Hopefully, he can show Nobunaga's daughter that the power of "Sodomu" can not only be used for evil but rather for good as well!

From Bliss:

With the death of Nobunaga, Japan is thrown into a mist of battle once again as the many warlords of the nation try to unite it as one. But can any succeed when faced against Nobunaga's sucessor, Toyotomi and his lust for power thats sets the flame for war as he try to take over the world fulfilling his ambitions of absolute power?

A manga based on the Sengoku Basara 3 action video game. The main characters, Date Masamune and Sanada Yukimura are two warlords who are both attempting to conquer all of the land. Almost greater than their desire to conquer, though, is their desire to fight each other in single combat.

It is the age of warlords, and with Date Masamune dead, Oushuu is being infringed upon by her neighbours. Until one day, a mysterious one-eyed man rolls into town...
Also here's motorcycles.

The manga is about the Sengoku Jidai (Warring States Period) of Feudal Japan. The rulers of the land - Daimyo - and their servants - Samurai - fight to get the rule of all Japan. Especially, the most powerful ones are the Devil King Oda Nobunaga of Owari, the Tiger of Kai Takeda Shingen, the Dragon of Echigo Uesugi Kenshin, the Hojos of Odawara Castle

When twins are born to the Oda household, Karin is tossed aside as an unwanted child. The one person who gave her strength through her childhood was her brother, Oda Nobunaga. Now both adults, Nobunaga sets about his plan for world domination in order to unify the world and create a place of happiness for both his subjects and his sister. However, tragedy strikes as Nobunaga is attacked in his palace and murdered. Beside his death bed, Karin vows to take on her brother's dream and act as his substitute, even if it requires making a deal with a demon to do so...

From Which Scanlations:

With a boyfriend who's an idol on the rise and a wacky grandfather who has a penchant for inventing and Japanese history, Hana's life is crazy enough. Things get even more complicated when Hana runs into a burning building, trying to rescue her grandfather, and finds herself face-to-face with a man who seems to be a samurai from the past...

A military test accidentally sends a modern-day army back in time to feudal Japan. When their actions in the past begin to have an effect on the present, another unit is dispatched to retrieve them. But the commander of the lost unit has other plans. He intends to use his advanced technology to conquer Japan and change his country's destiny. -- {Summary by Mangaupdates.com}

One fateful day, a girl time slipped into the Sengoku Era.
It was an abrupt enough event to be dubbed god’s whim, done to sate hellish boredom.
The girl has no power to change the world.
She was a very ordinary, common, and plain girl that can be found anywhere.
And that girl can do no more than a single thing.
Survive the Sengoku Era ——– that’s all.

On the way home from meeting a friend, Yuzuki hears a mysterious sound.
The next thing she knows, she’s in a world called “Jinga” where military commanders fight to unify the whole country. However, after being rescued by Toyotomi Hideyoshi, she learns that they are all vampires...?!
The popular mobile game with valiant yet beautiful military commanders gets a manga adaptation!

Sengoku Rance is all about the most perverted hero of a fantastical world. He journeyed to Japan in order to have his way with the ladies of this land, and ended up as the secret ruler of Nobunaga House. In the process of conquering Japan, he unwittingly play the dupe for an ancient demon sealed in this land just waiting to be freed. Nevertheless, be it either demons or hostile forces, none shall stand between Rance and his ladies.

From Storm in Heaven:

Kasane is your average kendo-obsessed girl, when a brush with a mysterious sword sends her back in time to the Sengoku Era. Stuck in an unfamiliar time and place, Kasane also has the poor luck of winding up right in the middle of the turmoil that surrounded Oda Nobunaga's rise to power!

From Tokyopop:

Masayoshi Kurozuka is an ordinary high school boy... until the day he discovers that he is the reincarnation of an evil woman named Oni-hime, who sold her soul to the devil during Japan's warring period.

Masayoshi must come to grips with his identity, all the while fighting off legions of ghosts -- the remnants of men killed by Oni-hime. In order to free himself from this curse, Masayoshi must discover the truth behind Oni-hime's deal with the devil and clear her name in the eyes of the restless spirits seeking revenge.

From Summer Rain:
Our protagonist, Hisaki has time slipped 450 years back to the Sengoku Era! Upon arrival she is greeted by Miyoshi Nagayoshi, a vampire. What on earth will happen to her now? Vampires, warriors, and a high school girl; a forbidden love though time begins!

"Stop your evil deeds and take the right path!" That is the creed of Youko Tama and her younger step brother, Jinka Sendou. The two demon siblings travel the country to stop the deeds of all evil doers, along with a scaredy-cat swordsman they picked up along the way, Hyoudou Shinsuke. During their travels, they will come across a monk organization with more than suspicious methods and they'll soon be at war.

Nadir is a sun-hating, anemic, young man who just wants to provide a stable life for his little sister, Amina. So he decides to take the Public Service Exam and get a job! However, on his way he's kidnapped by bandits and just as things begin looking hopeless he finds a mysterious lamp... How will this alter his destiny!?

In an alternate Earth, the armies of the Imperial Alliance have ravaged the entire Europan continent in 1935 EC during the Second Europan War. In the middle of the war, the army invades Gallian territory to acquire a mineral known as ragnite. Standing in their way is a recently drafted militia officer named Welkin Gunther, son of known Europan War hero, Belgen Gunther.

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