Dorcus titanus yasuokai

L1 – L2 larvae are individually packed in 5.5 oz cups.
L3 larvae are individually packed in 34 oz cups.
▪ Male larvae weigh 10g or more, and female larvae weigh 5g or more.

Parent body length: Male 90-96mm / Female over 48-50mm
Incubation period of eggs: Approximately 1 month
Substrate use for laying eggs: LB Flake Soil
Hatching rate of the eggs: 65-80%
Substrate use for larvae: LB Flake Soil 
Amount of flake soil used per larva: Male 15L (4 gallons) / Female 3.8L (1 gallon)
Larval period:  Male 10–15 months, Female 4–7 months.
Pupal period: 20-60 days
Inactive periods: 2-3 months
Maturity period: 3-5 months after inactive periods (It depends on the individual and its size, the larger they are, the longer it takes.)
Life span of adult: 10-16 months (can live longer if not paired)

💬 Generally, the final weight of DTY male larvae is around 50–60 g, but recently in Japan, larvae weighing over 100 g have been produced.
As of October 2025, the latest CB Guinness record is 110.3 mm from the KDS lineage.

🪵 Sumatran Stag Beetle – Dorcus titanus yasuokai

■ Species Overview

The Sumatran Stag Beetle (Dorcus titanus yasuokai) is a rare and highly prized subspecies of the giant Dorcus titanus, native to Sumatra, Indonesia.
Celebrated for its robust mandibles, broad thorax, and glossy black exoskeleton, this beetle stands out for both its striking appearance and superior bloodline among collectors.

■ Key Features

🔥 Rare and Distinctive – yasuokai is less common than the standard titanus, making it highly sought after by serious breeders.
🔥 Impressive Size & Strength – Males display strong, short-toothed mandibles and a powerful physique.
🔥 Breeding Value – Stable breeding performance with high-quality offspring, ideal for bloodline management.
🔥 Regional Variations – Unique characteristics distinguish this subspecies from other Sumatran populations.
🔥 Recommended For – Experienced breeders and collectors seeking a rare, high-quality stag beetle.

■ Care Information

📌 Temperature: 24 – 28 °C (75 – 82 °F)
📌 Humidity: Maintain slight moisture; avoid overly wet or dry conditions.
📌 Breeding Setup: Soft decayed wood or high-nutrient fermented substrate is ideal for egg-laying.
📌 Larval Growth: Thrives in well-prepared fermented flake soil or specialized breeding substrates.

■ Recommended Product Description

✅ Rare & Majestic – Dorcus titanus yasuokai.
With glossy black armor, strong mandibles, and exceptional bloodline value.
A must-have for serious stag beetle enthusiasts and breeders.

🔎 Dorcus titanus yasuokai Breeding record

📢 Important — Please Read: Shipping and Refund Policy

🚩 If you would like to pick up your package at USPS, 
Please write the following in the order note at shopping cart:
“Please hold for pickup at USPS.”
We will process your request and ship your order with a USPS Hold for Pickup label.
If the recipient’s area is below 60°F or above 85°F and they do not leave a ‘Hold for Pickup’ request, we will send a confirmation email. If we do not receive a response within 48 business hours, we will automatically ship the package using the Hold for Pickup service to maximize the survival rate of the live insects.