MegRhythm x 'Cells at Work!' Collaboration Announced! Comfort for Your Hardworking Eyes, Head, and Feet in the New Season – Limited Edition Release Starting April 4, 2026

Kao Corporation's healthcare brand, 'MegRhythm,' will release four limited-edition products featuring 'Cells at Work!' designs on April 4, 2026. These include the 'MegRhythm Steam Eye Mask' (Unscented and Herbal Scent) and the 'MegRhythm Adhesive Carbonated Gel Pack' (for Head/Neck and Feet).

The TV anime 'Cells at Work!' is a 'cell-personification anime' that depicts the secret struggles of cells within the body, centered on white and red blood cells. The original manga series has exceeded 10 million copies in circulation and is supported by a wide range of generations.

This spring, MegRhythm is collaborating with the popular 'Cells at Work!' series. April, the start of the new life season, is a time when environmental changes and stress can easily lead to accumulated fatigue. Just like the cells working hard inside our bodies, our 'working parts'—such as our eyes, head, and feet—are constantly active. These collaboration products are designed to support these hardworking areas, providing a gentle, soothing experience that relaxes the mind and brings a sense of comfort.

The 'MegRhythm Steam Eye Mask' gently wraps around the eyes with approximately 40°C steam, providing a soothing warmth that relaxes the mood. It refreshes you after long hours of computer work or smartphone use. You can choose between Unscented and Herbal Scent depending on the scene or your mood.

The 'MegRhythm Adhesive Carbonated Gel Pack' is a patch-type gel pack known for its refreshing sensation. The foot version refreshes the heavy, tired feeling from standing or commuting, while the head/neck version provides a sharp, revitalizing boost after desk work or studying. Because they are easy to apply, they can be seamlessly incorporated into a busy new lifestyle.

MegRhythm, along with the world of 'Cells at Work!', gently supports you as you move forward in your new life.

■ Product Features

MegRhythm Steam Eye Mask - 'Cells at Work!' Design

A virtuous cycle of comfort!

MegRhythm's steam-circulation design:

• Maintains a bath-like comfort at approximately 40°C.
• 1.5x better heat retention*1 to trap steam.
• Uses extra-thick, soft non-woven fabric that expands for a snug fit, relaxing your mood.
• Provides comfort for approximately 20 minutes.
• Helps improve sleep onset (Gold certified by the Sleep Support Certification System established by the Sleep Healthcare Council).

※Not a medical device.

*1 Compared to our previous products.