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TRANSLATION: white-spotted char; literally “rain trout”
HABITAT: cold streams and lakes, occasionally seagoing
DIET: carnivorous, ranging from small fish and plankton up to and including large boats

APPEARANCE: Amemasu is the Japanese name for the white-spotted char (Salvelinus leucomaenis leucomaenis), a species of trout which is found in Northeast Asia. They are a popular target of game fishing and are also raised in fisheries.

BEHAVIOR: Amemasu spend most of their lives in the water, away from humans. They are found mostly in rivers and streams, but seagoing varieties exist as well. They are more common in Hokkaido, the northern parts of Honshu, and along the Sea of Japan—however legends of amemasu are occasionally found in the southern parts of Japan as well. They feed on whatever they can eat—from plankton to insects, to fish and any other aquatic lifeforms they can fit into their mouths. Yōkai amemasu can grow to colossal sizes, sometimes spanning an entire lake from head to tail. These giant amemasu also occasionally thrash and sink ships, devouring any poor souls who happened to be on the ship. In Ainu folklore, the wild thrashing of giant amemasu is believed to be what causes earthquakes—much like giant catfish are thought to cause earthquakes in the rest of Japan.

INTERACTIONS:  Amemasu can transform into human shape and walk about on land. They usually take the form of young, beautiful women in order to seduce young men. Shape-changed amemasu can be identified by their skin, which feels cold and clammy like that of a fish.

LEGENDS: A number of lakes in Hokkaido are believed to be the home of giant amemasu. According to Ainu folklore, these amemasu are thought to be the guardian deities of their respective lakes. Lake Mashū is home to an amemasu the size of a whale. Lake Shikotsu contains an amemasu so large that its head touches one end of the lake and its tail touches the other.

A legend from Minabe, Wakayama Prefecture tells of a mysterious whirlpool that appeared in a deep pond. A giant amemasu lived in the pond. Every spring, she would emerge from the pond in the form of a beautiful woman. For two or three days she would catch young men and take them away—where to nobody knows, but they were never seen again. The only way to know that it was a fish and not a woman was from her cold, clammy skin. One day, a cormorant dove into the pond to go hunting. The giant amemasu swallowed the bird in a single gulp. However, after a short time, the amemasu’s body floated up to the surface of the pond, dead. The cormorant burst out of its stomach. A shrine was built at that spot to honor Konpira-san, which still stands today.



TRANSLATION: the Japanese reading of its Ainu name, atuy kakura
ALTERNATE NAMES: atsuuikakura
HABITAT: Uchiura bay in Hokkaido
DIET: mainly a scavenger; occasionally eats ships

APPEARANCE: Atuikakura is an enormous sea cucumber which lives deep in Uchiura Bay in Hokkaido.

BEHAVIOR: Atuikakura is rarely seen due its underwater lifestyle. It spends most of its time deep in the water, occasionally attaching itself to chunks of driftwood and floating to other parts of the bay.

INTERACTIONS: Despite rarely being seen, Atuikakura can be very dangerous to ships on the bay. When Atuikakura gets startled, it thrashes about wildly, smashing or capsizing ships which happen to be bear it. It also sometimes mistakes a wooden boat for a piece of driftwood, attaches its mouth to it, and drags the ship under the waves.

ORIGIN: Atuikakura is the Japanese transcription of its Ainu name, atuy kakura. Atuy is the Ainu word for the sea, and kakura means sea cucumber. According to local legend, Atuikakura was formed when a mouru—the traditional undergarment of Ainu women—washed down a river and into the bay. The mouru settled at the bottom of Uchiura Bay and and turned into a giant sea cucumber.



TRANSLATION: this is the Japanese version of its Ainu name, Atkor Kamuy
HABITAT: Uchiura Bay in Hokkaido
DIET: omnivorous; it can swallow ships and whales whole

APPEARANCE: Akkorokamui is a gigantic octopus god which resides in Hokkaido’s Uchiura Bay. When it extends its legs, its body stretches over one hectare in area. It is so big that it can swallow boats and even whales in a single gulp. Its entire body is red. It is so large that when it appears the sea and even the sky reflect its color, turning a deep red.

INTERACTIONS: Any ship foolish enough to sail too close to Akkorokamui will be swallowed whole. Therefore, for generations, locals have stayed away from the water when the sea and sky turn red. Fishermen and sailors who had no choice but to be on the waters would carry scythes with them for protection.

ORIGIN: Akkorokamui comes from Ainu folklore, where it is known as Atkorkamuy. Its name can be translated as “string-holding kamuy.” String-holding likely refers to the octopus’s string-like tentacles, while kamuy is an Ainu term for a divine being—similar to the Japanese term kami. In Ainu folklore, Akkorokamui is both revered and feared as a water deity, specifically as the lord of Uchiura Bay.

LEGENDS: Long ago, in the mountains near the village of Rebunge, there lived a gigantic spider named Yaushikep. Yaushikep was enormous. His great red body stretched over one hectare in area. One day, Yaushikep descended from the mountains and attacked the people of Rebunge. He shook the earth as he rampaged, destroying everything in his path. The villagers were terrified. They prayed to the gods to save them. The god of the sea, Repun Kamuy, heard their prayers and pulled Yaushikep into the bay. When the great spider was taken into the water, he transformed into a giant octopus, and took over charge of the bay as its god. Ever since then, he has been known as Atkor Kamuy, or Akkorokamui in Japanese.