KINUJO Enters Hair Iron Market with the Launch of Sapphire Straight Pro

KINUJO's New Era in Hair Care: Sapphire Straight Pro

On March 23, 2026, KINUJO will launch its first professional straightening iron, the "KINUJO Sapphire Straight Pro," marking a significant entry into the hair straightening market. Developed in collaboration with professional hairstylists, this iron features a unique "Sapphire Plate" designed specifically for hair straightening.

Background of the Development

KINUJO has previously focused on hair styling tools equipped with silk plates that protect hair moisture during styling. However, in the realm of hair straightening, there is a critical need for effective control of heat and moisture to manage hair texture efficiently. This necessity prompted KINUJO to venture into the straightening iron sector, introducing the proprietary "Sapphire Plate," which diverges from their traditional silk plates.

The design process involved direct input from hairstylists who use these tools in everyday salon environments. The goal was to ensure the iron meets the specific demands of hair straightening: powerful straightening capability, ease of use, and the ability to produce shiny, healthy-looking hair. This product is geared toward professionals, offering a reliable solution for both training and practical use in salons.

Collaborators Speak

Daiichi Aoki, CEO of COA, emphasizes, "Straightening isn’t just about making hair straight; it’s about achieving softness and a naturally flowing shape. To accomplish this, it’s vital to avoid relying on high temperatures and maintain a stable temperature for even heat distribution. This iron focuses on plate quality and temperature control, aiming for a consistent finish regardless of the operator’s experience. It’s designed to elevate the overall quality of salon work."

Yuta Teramura, CEO of III, adds, "For this straightening iron, our priority was to ensure that any staff in the same salon could achieve a consistent quality in hair straightening. Given the delicate nature of the chemicals and heat involved, we pursued a design that minimizes reliance on subjective experience. The fine plates enhance maneuverability, while even temperature distribution ensures quality results. We’ve included a countdown function to help with timing and consistency, especially when assistants are involved."

Product Features

- Sapphire Plate: The unique Sapphire Plate minimizes friction resistance, reducing stress on hair cuticles by approximately 50% compared to standard treatments. This design not only provides superior straightening results but also enhances the softness and shine of hair, ensuring a beautiful outcome with ease of handling.

- Heat and Moisture Control: The KINUJO Sapphire Straight Pro features enhanced moisture activation and dehydration efficiency, allowing for optimal control of the internal moisture balance in hair. Compared to traditional models, this iron boosts dehydration efficiency by approximately 3.5%, ensuring even heat distribution from root to tip, effectively straightening even the curliest hair.

- Precision Plate Design: With approximately 24mm wide plates, this iron is designed for precision application, enabling easy access to the roots and smaller areas around the face. The thoughtful design not only supports uniform finishing but also enhances operational efficiency, allowing stylists to handle multiple techniques with confidence.

- Count Function for Training: The built-in counting function assists in training new assistants and ensures uniformity in results. By providing audible cues at one-second intervals, the technique timing becomes straightforward, reducing variability among stylist results. This innovative feature can be toggled on or off depending on user preference.

- Dedicated Heater Structure: This iron's unique heater architecture supports consistent results, rapidly heating up to 180℃ within about 21 seconds, significantly cutting down wait time. The quick temperature recovery feature ensures stability during continuous use, making it ideal for busy salon environments.

KINUJO Company Overview

Founded in 2012, KINUJO has established itself not merely as a product seller, but as a brand that enhances beauty in everyday life. The company's philosophy centers around unleashing the "inner beauty" in everyone while ensuring user comfort and high functionality in their products. KINUJO aspires to remain a pioneer in hair care technology, dedicating itself to advancements in the beauty appliance industry.