Ayumi Tachihara
Writing
Known For

While investigating the horrifying death of her boyfriend, Mai Takano learns about a videotape haunted by the spirit of a disturbing girl named Sadako, which kills anyone who watches it exactly one week later. When her boyfriend’s son, Yoichi, starts to develop the same psychic abilities as Sadako, Takano must find a way to keep the boy and herself from becoming the next victims.
Ring 2

Osamu rescues a girl who was being chased by two punks and is soon mixed up with the Yakuza
Chinpira

After learning that a conflict in western Kanto was sparked by development rights in the area, Yoshiro sets out to gather information. Meanwhile, Jin discovers that the one who triggered the gang war is Yoji, the son of the former head of the Ushio Group.
Jingi: Legend Of Battle Heroes Episode 3

Based on the comic by Ayumi Tachihara
Jingi

Ichikawa Hajime (a.k.a. Ping), a fisherman, is a single-minded man of the sea. He was only interested in fish and women, but at the request of a classmate, he agreed to support the city council election. Rokuda, on the other hand, has fled to this fishing town from an assassin to cover his mouth in a corruption case. Their encounter sets off a bomb in the world of politics and the yakuza.
Tousen - The Election

Nagisa Gumi Gold Batch Shirogane Maji (Tamotsu Ishibashi) was imprisoned in Aomori for attempted murder at the end of a war with the Shuyukai. However, even in prison, the enemies targeting Honki never cease. After repeated attacks by remnants of the Shuyukai, Maji lost a young man, Issei, whom he had taken as his apprentice in the prison. When Honki is eventually released from prison, he is confronted by a new enemy, the TARUMA clan, which has its sights set on Nagisa's territory. The gang's leader, Daruma (Tetsu Watanabe), has taken up with the head of the Kaze and plans to eliminate Maji, a young but charismatic figure with a strong following.
Maji! 5: Deadly Struggle

1995 DTV Japanese film. Based on Ayumi Tachihara's manga.
Abayo Hakusho

The young Jin Kambayashi, still a cadet for the Suna clan, tries to shoot the second head of the rival Kurokawa clan, but accidentally shoots Giro Yazaki, a young man who has nothing to do with the yakuza, in the leg. Giro, an activist with dashed dreams of revolution, resonates with Jin's simple, straightforward way of life and volunteers to become a yakuza. Meanwhile, Onimaru, a lieutenant of the Kurokawa clan, has murdered the second head of the clan and is about to pin the crime on the Suna clan.
Jingi: Prologue

After the Kikuchigumi smash-up, Shiragane Honki (Tamotsu Ishibashi), a member of the Nagisa clan's gold batch, is recognized for his manly spirit and joins the head family of the parent Kaze clan to serve as an apprentice. Maji, who receives the plighted love of the head of the Kaze (Tokuma Nishioka), is assigned to help collect debts under Akame, the number three of the 13 members of the Kaze's grass-roots batch. One day, Jiro, a thug in Akame's gang, absconds with the gang's money. Jiro's capture is entrusted to Maji?
Maji! 3

Nagisa Gumi Gold Batch Shirogane Maji (Tamotsu Ishibashi) has returned to his hometown of Nagisa after a successful stint in the Kazengumi. Just then, Maji receives word that his long-time enemies, the Shuyukai, are to leave the Kazagumi affiliate. The Nagisa territory, which is located in the neighbourhood next to the Shuyukai, is in a state of crisis. Maji's achievements in Kazagumi training earned him a big role as assistant to the Nagisa clan's young leader. However, the newly released Nagisa clan chairman, Isaburo Foragi, does not take kindly to this and interferes with Serious in any way... and the all-out war between the Shuyukai and the Nagisa clan begins!
Maji! 4: The Struggle

After the Nagisa clan's infighting three years earlier, the young boss, Kikuchi , who is unwilling to take over from his successor, Hirakawachi , establishes his own gang, the Kikuchi clan.
Maji! 2

The series centers around Jin, a hitman, and Yoshiro, a former far-left terrorist, who meet by chance and together rise through the ranks of yakuza society. Based on a Manga.
Jingi

Shirogane Maji (Tamotsu Ishibashi), now the head of the Kozugumi, is summoned by Akame Shinzan, the Kozugumi's substitute lender, and is told that there is a movement to revive the Shuyukai, which had been under excommunication. The new Shuyukai is headed by former Shuyukai executive Mikogami (Ryuji Katagiri), who is the new head of the group at the behest of Hirojikai chairman Taichi Hirosaki (Ren Osugi), who bears the same cursive badge of wind as Honkaku. Hirozaki has only one goal: to eliminate Motoki, who has quickly risen to the same position as himself. Immediately, Hirozaki orders Mikogami to begin raiding the territory of the child gang.
Maji! 6: Raging Fire

52nd movie in the series
Jingi 52: Chapter of Rebellion

Kuramochi’s granddaughter Yumiko elopes with Kase, a member of the organization. Thanks to Jin and his associates, they narrowly escape danger. However, the incident ends up sparking a new conflict…
Jingi: Legend Of Battle Heroes Episode 2

After Kenichi, the head of the Ushio Group, is murdered, Miyuki takes over control of the organization. However, her uncle Kakinuma begins plotting to seize the Ushio Group in order to gain control of its lucrative business interests…
Jingi: Legend Of Battle Heroes Episode 4

Two ambitious men, Jin Kamibayashi and Yoshiro Yazaki, set their sights on ruling the Kanto underworld. Cutting down every rival who stands in their path, they rise through the ranks and ultimately secure powerful positions within the Ichienkai, the region’s most dominant crime syndicate. But as they reach the top, even greater trials await…