Hong Kong Audio Brand 'COZOY' Launches in Japan with Entry-Level Wired Earphone 'D1'

Itoyokokusai Co., Ltd. is pleased to announce the new distribution of products from COZOY, an audio brand originating from Hong Kong. The first product to be released is the 'D1,' which will be available starting Friday, June 12.

About COZOY
COZOY is an audio brand founded in Hong Kong. It has built a solid brand foundation and earned high user ratings within the industry through its unwavering pursuit of sound quality. In 2025, Ouyue Audio Technology (Shenzhen) Co., Ltd. strategically acquired the COZOY brand, injecting new vitality into its development.

The brand utilizes 3D printing technology for rapid prototyping of complex structural components and custom production. By using injection-molded medical-grade resin, the brand achieves improvements in product accuracy, stability, and safety. Through a combination of proprietary R&D, a professional tuning team, precise acoustic measurements, and subjective listening evaluations, the brand strives to meet diverse user needs and balance sound quality with a high-level user experience.

D1
The 'D' in Dynamic Driver and the '1' signifying beginnings—the 'D1' embodies this concept. Equipped with an in-house developed φ10mm dual magnetic circuit, dual-cavity dynamic driver, it offers a clear and refreshing sound. With housings and faceplates made from medical-grade resin, the 'D1' is designed for everyone from first-time earphone users to long-time audio enthusiasts, all at an entry-level price point.

Driver
It features a single dynamic driver configuration using a dual magnetic circuit and dual-cavity design. This allows for a more pure and detailed music experience with an excellent soundstage and dynamic range, providing an immersive listening session. The diaphragm utilizes graphene. After numerous tests based on COZOY's commitment to sound creation, graphene was chosen as the material that met their required acoustic standards. It helps reduce distortion and provides powerful driving force, ensuring an appropriate balance across all frequency ranges.

Tuning
The tuning offers a moderate extension and depth in the low frequency range, with well-balanced vocal positioning in the center, making it suitable for long-term listening without fatigue. It achieves clear imaging and positioning, making it ideal not just for music, but also for gaming, allowing users to catch crucial sound effects with realism and power.

Housing
The housing and faceplates are made of medical-grade resin. Designed based on ergonomics, the shape is created using ear shape data from various ethnicities, providing a comfortable fit even for long periods. As it touches the skin, medical-grade resin is used to ensure safety for all users, from children to the elderly.

Cable
It comes with a silver-plated OCC (2Pin-3.5mm) cable. Silver plating enhances sound clarity and depth, giving percussion and vocals a more delicate and rich texture.

Main Specifications
Driver: φ10mm Dual magnetic circuit/Dual-cavity Single Dynamic Driver
Frequency Response: 20-20,000Hz
Impedance: 32Ω
Sensitivity: 100dB
Housing Material: Medical-grade resin
Cable: Silver-plated OCC (2Pin-3.5mm)
Cable Length: Approx. 1.2m
Plug: 3.5mm

Pricing and Details
Model Name: D1
Price: 5,980 yen (incl. tax / 3.5mm), 6,280 yen (incl. tax / 3.5mm+Mic)
Release Date: June 12, 2026 (Friday)
Warranty: 1 year