Top 5 Tensei manga.

 Top 6 Tensei manga.

1. Tensei Shitara Slime Datta Ken.

The main character is a lonely middle aged Japanese office worker. He dies protecting his ' Kouhai ' from a stabber, during which he gets stabbed and dies himself. after his death he reincarnates as a slime in another world filled with magic. With his unique skill 'Predeator' he gets stronger very quickly. He is forced to become the chief of a small gobling village which he develops into a country of monsters. Follow the main character in his journey. 

2.  Isekai Tensei Soudouki.

 

Baldr Cornelius is the son of a noble of the Mauricia kingdom and inside him also dwell the souls of the avaricious warring states commander Oka Sanai Sadatoshi and animal ear otaku high schooler Oka Masaharu. Follow the journey of these 3 souls in a single body, as they exhibit extraordinary abilities when it comes to combat or managing the domain. the main character is a pervert, greedy, smart and overpowered. check it out if you haven't till now.

3. Tensei Shitara Ken Deshita.

After dying from a car accident, the protagonist finds himself reincarnated in another world as a sword with no recollection of his name, though he remembers everything else from his previous life. Accepting his fate as a sword, he begins to seek someone to become his wielder. He discovers a caravan of slave traders under attack by a two-headed bear. A young catgirl slave, Fran, discovers the sword, and uses him to kill the bear. After being freed from slavery, she names the sword "Teacher", and the two embark on an adventure together. Its a fun to read manhwa with a good and funny main character.

4. Tensei Kenja No Isekai Raifu ~Daini No Shokugyo Wo Ete, Sekai Saikyou Ni Narimashita~.

Sano Yuji, a black company employee, is summoned to another world while finishing his work at home. His profession in the other world, a Monster Tamer, is considered a job that makes it difficult to become an adventurer. However, thanks to some slimes he met, which read several magical books, he gained magical powers and the second profession, Sage. Yuji acquired overwhelming power, but is he conscience of his strength? Blindly becoming unparalleled and strongest in the world. the main character is a lonely bum but still the manga is enjoyable. its a causal manga where the main character just wants to live peacefully as possible but trouble finds him.

5. Tensei Kizoku No Isekai Boukenroku ~Jichou Wo Shiranai Kamigami No Shito~.

The main character is killed while saving his sister and his childhood friend from a stranger. Because of his bravery he gets to meet gods who gives him opportunity to get reincarnated in another world but at the age he is supposed to get his status he learns that he is ridiculously overpowered. Later he learns that god gave him such power to fight the evil god which was sealed by the hero who was also an reincarnated Japanese person.

6.  Tensei Shitara Dai Nana Ouji Dattanode, Kimamani Majutsu O Kiwamemasu.

A magic nerd was beaten by a noble mage and ridiculed for his lack of magic. After being killed by that same noble magician. He gets reincarnated as the seventh prince of the kingdom. Now he has a lot of magic and time to study magic as much as he wants. The main character is shown to be easy going who takes everything as a joke. He is absurdly strong and smart. He also plays around with his enemies a lot during the fight scenes which is quite hilarious.

A magic nerd was beaten by a noble mage and ridiculed for his lack of magic. After being killed by that same noble magician. He gets reincarnated as the seventh prince of the kingdom. Now he has a lot of magic and time to study magic as much as he wants. The main character is shown to be easy going who takes every thing as a joke. He is absurdly strong and smart. He also plays around with his enemies a lot during the fight scenes which is quite hilarious