Snakes in Japan: A Comprehensive Guide

Japan is home to over 40 species of snakes, ranging in size, shape, and behavior. The Japanese rat snake is one of the most common species found in the country.

Some species of snakes in Japan are venomous, including the habu, a type of pit viper found in the southern islands. The habu's venom is a potent neurotoxin that can cause respiratory failure.

Despite their fearsome reputation, most snakes in Japan are harmless to humans and play a vital role in the ecosystem by controlling rodent populations.

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Japan is home to a diverse range of venomous snakes, including the Japanese Mamushi (Gloydius blomhoffii), which is found throughout the country.

The Ryukyu Island Pit Viper (Ovophis okinavensis) is a species of pit viper found only in the Ryukyu Islands.

Some snakes in Japan are known for their striking patterns, such as the Japanese Coral Snake (Hemibungarus japonicus), which has a distinctive coral-like pattern on its body.

The Japanese Keelback (Amphiesma vibakari) is a common species found throughout Japan, and is known for its distinctive keel-like scales on its back.

The Habu (Protobothrops flavoviridis) is a highly venomous species found in the southern islands of Japan, and is known for its aggressive behavior.

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The Ryukyu odd-tooth snake is a non-venomous snake found throughout the Ryukyu Islands.

They are fairly common on Okinawa and are usually found at night.

The Akamata is a natural enemy of the venomous Habu snake.

They are one of the few snakes capable of feeding on venomous pit vipers.

This beautiful snake has been overlooked and needs to be protected.

Sadly, I see more dead on the road than alive.

The Akamata is one of the few snakes that feed on sea turtle hatchlings in northern Okinawa.

Juvenile Akamata can puff out their head to resemble a diamond shape, a common defense mechanism with other non-venomous snakes around the world.

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In Japan, some snakes are venomous, and it's essential to know which ones to watch out for. The Japanese Mamushi, also known as Gloydius blomhoffii, is one such snake that's found in the country.

The Tsushima Mamushi, Gloydius tsushimaensis, is another venomous snake that's native to the Tsushima Islands.

Some snakes in Japan are highly venomous, like the Japanese Mamushi, which can deliver a painful bite.

The Sakishima Habu, Protobothrops elegans, is a venomous snake that's found in the Sakishima Islands.

The Okinawa Pit Viper, Ovophis okinavensis, is a venomous snake that's specific to the Okinawa Islands.

The Habu, Protobothrops flavoviridis, is a highly venomous snake that's found in various parts of Japan.

The Tokara Habu, Protobothrops tokarensis, is a venomous snake that's endemic to the Tokara Islands.

The Yamakagashi, Rhabdophis tigrinus, is a venomous snake that's also known as the Japanese Garter Snake.

The MacClelland's Coral Snake, Sinomicrurus macclellandi, is a venomous snake that's found in Japan and other parts of Asia.

Japan's diverse geography supports a wide range of snake species.

The Japanese archipelago is home to over 40 species of snakes, with many more found on the surrounding islands.

From the northernmost island of Hokkaido to the southernmost island of Kyushu, snakes can be found in various habitats.

Mountainous regions like the Japanese Alps provide a habitat for species such as the Japanese rat snake and the Japanese keelback.

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In Japan, the mountainous regions are home to a unique species of snake, the aodaisho rat snake, which can be found in the main islands. This species is known for its painful bite, despite being nonvenomous.

The aodaisho rat snake can grow up to close to two meters in length and is often seen in urban areas and around rice paddies. It has distinctive red eyes and four black stripes.

In the Ryukyus, a different set of species can be found, including the habu pit viper, a thick and deadly venomous species that reaches lengths of over two meters. This species is not found in the main islands.

The Ōmiwa Shrine on Mount Miwa is a sacred site associated with the deity Ōmononushi, who is said to reside in the form of a white snake. This snake is revered for its power to cure disease.

Followers of the shrine leave offerings of raw eggs and sake as a way to ward off infectious maladies. The shrine is also significant to sake brewers, who offer bottles of sake alongside the eggs.

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Okinawa is a tropical paradise located in the southernmost part of Japan, comprising the Ryukyu Islands. The islands are home to a diverse range of wildlife, including the Brahminy blind snake (Ramphotyphlops braminus), a non-venomous snake found throughout the Ryukyu Islands.

The Brahminy blind snake is a common sight on Okinawa, often found in drainage ditches, on roads, and sidewalks. They're small, averaging 15-21cm in length, and dark brown in color.

The Ryukyu Islands offer a unique habitat for the Brahminy blind snake, with forests, grasslands, and sugar cane fields providing an ideal environment for them to thrive.

Here's a comparison of the Brahminy blind snake and a worm:

This distinction is crucial in identifying the Brahminy blind snake, as it's often mistaken for a worm due to its small size and dark color.

The warm weather on Okinawa, especially during the summer months, can be challenging for the Brahminy blind snake. As the top layer of soil dries out, the snakes are forced to venture onto the pavement, making them more visible and vulnerable to predators.

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Snakes in Japan are incredibly diverse, with over 70 species calling the country home.

The Japanese rat snake is one of the most common species found in Japan, known for its slender build and grayish-brown color.

They are skilled climbers and can often be found in trees.

The Japanese keelback is another species of snake found in Japan, recognized by its distinctive keel-shaped scales on its belly.

It's a venomous snake, but its venom is not highly toxic to humans.

The Japanese habu is a venomous snake found in the southern islands of Japan, known for its aggressive behavior and powerful venom.

It's a highly effective hunter, feeding on small mammals, birds, and lizards.

Snakes are widely revered as messengers and familiars of local deities in Japan, particularly associated with water spirits.

In Japan, irrigation ponds called tame-ike have traditionally been treated as sacred places, inhabited and protected by spirits known as Suijin, or water deities.

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Tame-ike irrigation ponds are formed by damming the upper reaches of a narrow valley, where water naturally springs or seeps from the surrounding slopes.

The Suijin enshrined at Shinobazu Pond in Ueno Park is an extremely popular Buddhist deity known as Benzaiten, who is sometimes depicted with a coiled snake sitting on top of her head.

A closely related Suijin, Ugajin, is also often revered at irrigation ponds, and can be seen in the form of a stone statue just above the pond at Inokashira-koen park in western Tokyo.

Snakes in Japan are associated with water and water-spirits because they prey heavily on frogs and other small animals that live around the water, and most snakes have a lung that serves as an internal float, allowing them to swim effortlessly across the surface of the pond.

The mamushi pit viper, a type of snake found in Japan, is particularly well-suited to life in and around water, with its short but thick body and fat head with puffed cheeks holding the poison glands.

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Japan is home to over 40 species of snakes, but some species are more common than others.

The Japanese rat snake is one of the most widely distributed species in Japan, found on the main islands of Honshu, Shikoku, and Kyushu.

The Japanese habu, a venomous snake, is found on the southern islands of Okinawa and Iriomote.

The Akamata, also known as the Ryukyu odd-tooth snake, is a non-venomous snake found throughout the Ryukyu Islands.

They are fairly common on Okinawa and are usually found at night, making them a natural enemy of the venomous Habu snake.

The Akamata feeds on venomous pit vipers, one of the few snakes capable of doing so, and should be conserved for this specific reason.

They also feed on sea turtle hatchlings in northern Okinawa, which is a unique aspect of their diet.

This beautiful snake has been overlooked and needs to be protected, as I've seen more dead on the road than alive.

The Akamata has a unique defense mechanism where it can puff out its head to resemble the diamond shape of a venomous pit viper, which I've observed firsthand.

Here are some key facts about the Akamata:

Table 1 provides a breakdown of estimated incidence of mamushi snake bites in Japan.

The latitude range of 42–46°N reported only 9 cases of mamushi bites during July 1–December 31 in 2007 and 2008.

The coverage rate of acute care beds in this range was 36.2%.

The number of persons in this range was 52,000.

The estimated incidence of mamushi bites per 100,000 persons per 6 months was 0.24 (95% confidence interval: 0.11–0.37).

Here's a summary of the estimated incidence of mamushi snake bites in different latitude ranges:

The estimated incidence of mamushi bites was also higher in other latitude ranges, particularly in the range of 30–34°N, where the estimated incidence was 4.80 (95% confidence interval: 4.46–5.13) per 100,000 persons per 6 months.

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