Movies Like Reigo: King of the Sea Monsters

If you liked Reigo: King of the Sea Monsters (2008), a science fiction and fantasy movie directed by Shinpei Hayashiya, here are 20 movies with a similar feel, based on TMDB's recommendations. Each one links to its cast, trailer and where it's streaming.

1
Godzilla vs. SpaceGodzilla (1994)
★ 6.7/10Also science fiction
A mysterious extraterrestrial being resembling Godzilla rapidly approaches Earth. The monster, dubbed SpaceGodzilla, lands to challenge the King of the Monsters.
2
Attack on Titan II: End of the World (2015)
★ 6.3/10Also science fiction
Eren Yeager leaves to restore a break in the wall destroyed by a Titan. He comes under attack by the Titans and is cornered. Shikishima comes to his aid. The titans never stops attacking. Eren is now injured and tries…
3
Gigantis, the Fire Monster (1959)
★ 6.4/10Also science fiction
A prehistoric monster called Gigantis emerges alongside another creature named Angurus.
4
Gamera vs. Barugon (1966)
★ 6.4/10Also fantasy and science fiction
Gamera escapes from his rocket enclosure and makes his way back to Earth as a giant opal from New Guinea is brought back to Japan. The opal is discovered to have been an egg that births a new monster called Barugon…
5
Kaiju No. 8: Mission Recon (2025)
★ 8/10Also science fiction
In a Kaiju-filled Japan, Kafka Hibino works in monster disposal. After reuniting with his childhood friend Mina Ashiro, a rising star in the anti-Kaiju Defense Force, he decides to pursue his abandoned dream of joining…
6
Godzilla 2000: Millennium (1999)
★ 6.9/10Also science fiction
An independent group of researchers called the Godzilla Prediction Network (GPN) actively track Godzilla as he makes landfall in Nemuro. Matters are further complicated when a giant meteor is discovered in the Ibaragi…
7
The War of the Gargantuas (1966)
★ 6.3/10Also science fiction
Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein's monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira's Gargantua brother, Sanda, descends from…
8
Rodan (1956)
★ 6.5/10Also science fiction
Mining engineer Shigeru investigates the disappearance and death of his fellow coworkers when prehistoric nymphs are discovered emerging from the mines. After an attack on the local village, Shigeru heads deeper into…
9
Ghidorah, the Three-Headed Monster (1964)
★ 7/10Also science fiction and fantasy
After a meteorite unleashes a three-headed beast upon Tokyo, Mothra tries to unite with Godzilla and Rodan to battle the extraterrestrial threat.
10
Godzilla (1954)
★ 7.6/10Also science fiction
Japan is thrown into a panic after several ships are sunk near Odo Island. An expedition to the island led by Dr. Kyohei Yamane soon discover something far more devastating than imagined in the form of a 50 meter tall…
11
Invasion of Astro-Monster (1965)
★ 6.8/10Also science fiction
Astronauts Glenn and Fuji investigate Planet X and encounter mysterious aliens known as the Xiliens, who ask Earth's people to help save their world from "Monster Zero". In exchange for borrowing Godzilla and Rodan…
12
Shin Ultraman (2022)
★ 7.5/10Also science fiction
The Japanese government sets up a special task force to fight the giant creatures suddenly appearing across the country. Soon, the squad unexpectedly meets a giant silver humanoid who starts appearing every time a…
13
Godzilla vs. Megalon (1973)
★ 6.2/10Also science fiction
Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the…
14
Gamera 2: Advent of Legion (1996)
★ 7.5/10Also fantasy and science fiction
A strange meteor lands in Japan and unleashes hundreds of insect-like "Legion" creatures bent on colonizing the Earth. When the military fails to control the situation, Gamera shows up to deal with the ever-evolving…
15
Godzilla, Mothra and King Ghidorah: Giant Monsters All-Out Attack (2001)
★ 7.5/10Also fantasy and science fiction
Godzilla has become a distant memory for Japan when the destruction of a US submarine raises alarms for Admiral Tachibana. His estranged daughter Yuri investigates the legend of the guardian monsters, who must rise to…
16
Godzilla, King of the Monsters! (1956)
★ 6.5/10Also science fiction
During an assignment, foreign correspondent Steve Martin spends a layover in Tokyo and is caught amid the rampage of an unstoppable prehistoric monster the Japanese call 'Godzilla'. The only hope for both Japan and the…
17
King Kong vs. Godzilla (1962)
★ 6.8/10Also science fiction and fantasy
The advertising director of Pacific Pharmaceuticals, frustrated with the low ratings of their sponsored TV program, seeks a more sensationalist approach. He orders his staff to Faro Island to capture King Kong for…
18
Pacific Rim (2013)
★ 7/10Also science fiction
Using massive piloted robots to combat the alien threat, Earth's survivors take the fight to the invading alien force lurking in the depths of the Pacific Ocean. Nearly defenseless in the face of the relentless enemy…
19
Gamera: The Guardian of the Universe (1995)
★ 7.4/10Also fantasy and science fiction
A ship runs aground on a mysterious atoll leading to an investigation by insurance representative Kusanagi, who discovers an ancient bead that he gives to his daughter Asagi. Meanwhile, ornithologist Nagamine…
20
Mothra vs. Godzilla (1964)
★ 7/10Also science fiction
Journalists Ichiro Sakai and Junko cover the wreckage of a typhoon when an enormous egg is found and claimed by greedy entrepreneurs. Mothra's fairies arrive and are aided by the journalists in a plea for its return…