Japanese Mamushi

Most venomous snake in Japan. Bites thousands annually. Antivenom available.

FamilyViperidae

GenusGloydius

RegionAsiaJapan, East Asia

Photo: Alpsdake · Source: Wikimedia Commons · License: CC BY-SA 4.0

Japanese Mamushi

Photo: Alpsdake · Source: Wikimedia Commons · License: CC BY-SA 4.0

Japanese Mamushi

Danger Score

Final Danger Score

Venom Core

Lethality weighted 55% (potency × yield). Clinical weighted 45% (real-world CFR).

0.55 × 40 + 0.45 × 2734.1

Modifiers

Multiplicative scalers - amplify or reduce existing danger, can't create it from nothing.

× Speed (1.01)34.5

× Delivery (1.00)34.5

× Encounter (0.86)29.7

Speed = antivenom window. Delivery = fang efficiency. Encounter = exposure × temperament.

Score30

Venom Profile

Type

HemotoxicTargets blood and circulatory system; disrupts clotting and can cause bleeding disorders.,CytotoxicDestroys cells and damages tissue; can cause permanent tissue damage and disfigurement.

Venom Yield

Low

Venom Speed

Quick

Delivery Method

Hinged front fangs

Potency (SC Equivalent)

0.900mg/kg LD50

Max Dry Yield

15mg dry

Clinical Severity

Fatality (Untreated)

1-5%

WHO Importance

Cat. 2

Local Effects

Pain at bite site, Swelling

Blood

Coagulopathy, Circulatory shock

Muscle

Kidney failure

Gastrointestinal

Nausea or vomiting

Causes of Death

Massive internal bleeding, Kidney failure, Circulatory shock