The spin-off manga of Kamen Rider 555, focusing on Masato Kusaka a.k.a Kamen Rider Kaixa.

After losing everything and running away, there is a free mahjong parlor in the crowds of Shinjuku. I have 0 yen to my name, Still I chose to live. This is a battlefield. And in a battlefield… it's kill or be killed. (Source: Takeshobou, translated)

Stories that are abundant in this world... novels, manga, movies, and anime. These supposed fantasies are records of worlds that actually exist as "other worlds". This is the story of a summoner who ties together these numerous worlds with reality. (Source: Comic Bushiroad, translated)

The manga is based on the classic Japanese novel Nansou Satomi Hakkenden, which begins with Fusehime and her dog husband's deaths at the hands of Fusehime's former fiancée. Years later, eight young warriors — all bearing the word "dog" in their surnames — gather together to fight for justice.

Yukko had always felt that she has a hard time trying to express what she really feels and thinks about the people around her. She wants to sincerely praise her friend and express how good she was on her music recital but all she can say was, "Amazing," which she thinks is rather shallow. It just didn't sit right with her. On her way home contemplating about all this, she comes across a bizarre shop that might change her perspective and help her grow.

Astekaizer follows the exploits of Hoshi, a professional wrestler who could transform into Astekaizer, a champion of justice. Released alongside a relatively obscure TV show with the same name in 1976. The show was a mix of live-action (Tokusatsu) and animation, created by Go Nagai.

This story is set in the ancient times of Emperor Suinin (around 29 BC–AD 70). The story opens with the mythical wrestling match ordered by the Emperor, between Nomi no Sukune and Taima no Kehaya. This match is recorded in the "Nihon Shoki," one of the writings that compose the Kiki legends. Within this story, the match is ordered to determine ownership of a specific piece of land. After the match, the story continues with the effects of the outcome on those involved, such as the surviving combatant, the Emperor, the people of Izumo, and the loser's son Isachi. (Source: MangaHelpers)

There have been a number of TMNT manga published in Japan which have never been released in the West. Mutant Turtles Gaiden is a collection of short stories drawn and written by Hiroshi Kanno and published by Dengeki Comics.

Takeshi Kuri, a juvenile delinquent, has a talent for baseball, but smokes cigarettes, has brown hair, and hits people when he gets mad. By the time he was in junior high school, he had played on six different teams, four of which were suspended and two of which were disbanded. He was often ejected from games early on, or had to forfeit games, and was regarded as a useless pitcher by those involved. After being rejected by a number of prestigious schools, he was given one last chance at Yumenoshima High School. During the interview, he hit the manager, Kudo, but somehow managed to pass on one condition. The condition was that he would live with the coach at his house. Kudo is a man who once worked as a coach at the prestigious Toyo. On the first day of school, Kuri took the field in a red and white match. However, he is harassed by the head of the department, who values discipline and common sense. Hisato overcame many hardships and went on a rampage at the South Tokyo Tournament and Koshien. The insane baseball team creates a whirlwind nationwide.

Sickly and weak-willed, 15-year-old Miyazono Yuuri stumbles upon an ancient artifact known as the Witchblade. The weapon quickly takes control of her life and soon Yuuri finds herself succumbing to its incredible power as she seeks to protect her island home. *Note: A stand-alone novel that focuses on Yuuri, the Witchblade bearer chronologically between Takeru and Masane.*