It's Not Easy to Be a Man After Travelling to the Future (WN) - Chapter 122: The Cheetah Mecha Operator!

Lu Qingshan, a renowned player ranked in the top ten of the Sword Cultivators’ leaderboard in “Nine Heavens,” had been reincarnated into the very game world for which he had always strived. Sword Cultivator, a class in “Nine Heavens,” known for dealing the highest damage but also having the least amount of health, leading to their nickname “Brute.” In this life, Lu Qingshan had still chosen the path of the Sword Cultivator. However, this Sword Cultivator seemed a bit too stable???

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!

A college student, accidentally reborn into the world of Naruto, becomes a member of Uchiha who is destined to be exterminated.

In this cruel ninja world, in the face of endless wars and exclusion from the village, what will Uchiha Qing do?

PS: Later in the book, the protagonist will develop a system of immortal cultivation. Cultivating Immortals in the Ninja World, have you seen it?

- Description from novelbuddy