On an Earth where neither heroes nor kaiju exist, an alien suddenly falls from the sky. This Ultra's symbol is the red space boomerang he holds, the Omega Slugger, and his name means "ultimate." "Omega" is an alien who has lost his memories. Taking human form and adopting the name "Sorato", he becomes interested in the life forms called "Earthlings" that he is encountering for the first time and attempts to understand them. When a giant life form appears, amnesiac Sorato recalls a word-"kaiju". As these kaiju continue to appear before him, a sense of duty awakens in Sorato's subconscious. He transforms into "Ultraman Omega" and an intense, fast-paced fight unfolds. The Earthlings, in turn, are grappling with encountering these gigantic life forms and the alien that fights with a red slugger for the first time, watching from various places and trying to understand what they are. Before long, Sorato and an ordinary young man-an alien and an Earthling, become friends. This ambitious work poses a question through these friends' resonating hearts; "Why does Ultraman protect the Earth?" Now, is when they awaken.

In a town called Hoshimoto City.. A giant object towers in Mt. Shishio. Named "Monohorn", it is actually a kaiju's horn stuck in the ground since an incident 16 years ago.

The incident when kaiju appeared simultaneously around the world was later named "K-Day". Since then, the Global Defense Force (GDF) has been dealing with kaiju with force, while SKIP (Scientific Kaiju Investigation and Prevention center) works closely with the community in scientific investigations and evacuation guidance to prevent the occurrence and aggravation of kaiju disasters. SKIP has also been investigating the Monohorn, the horn of the galactic beast Monogelos, which appeared on K-Day.

Yuma, then only 7 years old, was camping with his parents in Mt. Shishio when Monogelos attacked, but somehow miraculously survived unhurt. This experience led him to pursue the path of kaiju biology research, and despite his traumatic past, he has not lost his "imagination" to dream. As a rookie investigator, Yuma joined SKIP and was assigned to the Hoshimoto City Branch.

Not long after, another large-scale kaiju disaster occurs. As Yuma sees the desperate people in front of him, a strong will springs into his mind — "I want to protect them!" It was at that moment when Yuma hears the voice of Rution, the being of light that he once saw as a child: "You and I are one and the same… Unleash your imagination!"

When the mystic light emerging from Yuma's hand embodies his entire body, his power of imagination fuses him with the light and he transforms into Ultraman Arc, the Giant of Light who protects the future! Alongside his precious friends, Yuma, as well as Ultraman Arc, gallops towards his everlasting dream!

Established in 1966 by nations all around the world in response to the worldwide outbreak of kaiju disasters, the Global Guardian Force (GGF) deals with kaiju and extraterrestrial life forms' attacks on Earth.

Today, Earth sees continued destruction of nature and rapid rise in global warming. One night, a space crustacean kaiju Bazanga appears. The GGF's cleanup operation is unsuccessful, and the special forces led by Gento Hiruma find themselves in a desperate situation. This is when a mysterious giant emerges from light. It is the unidentified humanoid alien that has been rumored among astronauts for decades, code-named "Ultraman".

Later, Gento is summoned to the command center, where he is officially appointed as the commander of SKaRD, short for Special Kaiju Reaction Detachment, a team that had been secretly formed. Leading a special unit that pilots a giant kaiju-type robot artillery, Earth Garon, to respond with kaiju disasters. While Gento is ordered to investigate the Ultraman from the Battle of Bazanga, to determine whether it is a threat that needs to be eliminated or not, he has a flashback of a faraway galaxy—a shred of memory of a blazar.

The threat of monster attacks fades, and the Earth seems once again at peace. Humanity turns its eyes to the stars and heads to space, while its monster attack countermeasures continue to shrink.

When two brothers with clashing personalities obtain incredible powers, they focus on overcoming their differences to defend Earth as a superhero team.

Families are always around us and hence they are likely to be taken for granted. This is a story of brothers, revolving around the main theme of "Bond" and "Love". One day, the brothers encounter a monster and almost lose their lives in the mountain. Then, two transformation items appear there suddenly, and the brothers will throw themselves into the battle world as Ultraman...

This is a story of a hero who inherits Ultraman Belial, the evil Ultraman's genes.  Despite suffering from repeating setbacks and despair of knowing the secret of his birth and cruel fate, he never loses sight of friendship and strong will to become a true hero.  The story unfolds through the spiritual growth of the protagonist who seeks for the meaning of his own life and finds the place where he belongs, through fighting against evil and his own cursed destiny, to become a hero of justice.

A cosmic being joins with a 19-year-old human to form a gigantic superhero and battle monsters infected with a virus that makes them dangerously aggressive.

Ultraman Tiga (ウルトラマンティガ Urutoraman Tiga) is the 12th entry in the Ultraman Series, airing from September 7, 1996 to August 30, 1997. It was the first Ultraman Series broadcast in Japan since 1980's Ultraman 80. The series is notable for revolutionizing and revitalizing the franchise, not to mention the great effect it had on the tokusatsu genre as a whole outside of Tsuburaya.

Despite being preceded by Ultraman Great as the first Ultraman Series to be aired in Japan in the Heisei period, and by Ultraman Neos to be the first Japanese-made Ultraman Series in the Heisei period, it is Ultraman Tiga that is officially and unofficially recognized as Tsuburaya Productions' first proper Ultraman Series entry in the Heisei period.

Set in a universe different from all previous series, Ultraman Tiga introduced new and radical updates to the Ultraman character for a new generation of audiences; most notably staring the first Ultraman with multiple combat modes and non-red colors (purple and gold). It is also considered one of the most popular entries in the franchise.