Comb Day (Kushi no Hi)

What Is Comb Day?

September 4th is "Comb Day" (Kushi no Hi). It comes from a wordplay reading: 9 ("ku") and 4 ("shi") combine to sound like "kushi," the Japanese word for "comb." The day was established by the beauty industry (hairdressers, barbers, and manufacturers) to encourage people to take a fresh look at combs, brushes, and other hair care tools, and to raise awareness about caring for one's hair.

Why September 4th Is "Comb Day"

Beyond the wordplay, early September is also a good time to care for hair that's been damaged by summer's UV rays and sweat. The beauty industry runs hair care awareness campaigns centered around this day.

• The wordplay: 9 ("ku") + 4 ("shi") = "kushi" (comb).
• Hair care awareness: An opportunity to reconsider the health of your hair and scalp.
• An industry-led celebration: Established mainly by hairdressers and barbers.

The History and Culture of Combs

Combs are an everyday tool that have been used since ancient times, and in Japan they carry particular cultural significance.

• Ancient ornamentation: In fact, wooden combs have even been excavated from Jomon-era archaeological sites.
• Ties to traditional dress culture: Hair ornaments like kanzashi hairpins and combs played an important decorative role.
• Lucky (and unlucky) charms: Because the sounds for 9 and 4 can also be read as "ku" (suffering) and "shi" (death), combs were sometimes avoided as gifts—yet in some regions they were also believed to ward off evil.

Types of Combs and Their Features

Combs come in a variety of types depending on their use and material.

• Boxwood combs: A traditional comb that's gentle on hair and resistant to static.
• Plastic combs: Lightweight and easy to handle, convenient for everyday use.
• Brushes: Well-suited for scalp massage and adjusting hair volume.
• Fine-tooth combs: Used for styling and detailed grooming.

Interesting Facts About Comb Day

• Caring for boxwood combs: Treating them with camellia oil keeps them in good condition longer and improves how smoothly they glide through hair.
• Preventing static: Wooden combs and natural-bristle brushes are less prone to static buildup.
• Hair health: In fact, proper brushing can help improve blood circulation and add shine to hair.
• Also "Beauty Day": September 4th is sometimes also marked as "Beauty Day" (Biyou no Hi).

Tips for Enjoying Comb Day

• Check the comb or brush you currently use for dirt or wear.
• Try out hair-friendly tools like a boxwood comb or a high-quality brush.
• Learn proper brushing techniques and make hair and scalp care a habit.
• Consult a hairstylist about a hair care routine suited to your hair type.

A Small Tool That Shapes Your Hair Supports Your Beauty Every Day

September 4th, "Comb Day," is a day to reconnect with your hair and revisit the basics of beauty care. Taking a quiet moment to carefully brush your hair with a favorite comb can also be a gentle reset for the mind.