"uka," operated by the total beauty company uka Co., Ltd., released the nail color "uka Moon study 27/Sep" in limited quantities on Sunday, September 27, 2026. It comes in a 10 mL size and is priced at ¥2,750 (tax included).
The color is a mocha brown with hidden passion, inspired by the full moon name "Harvest Moon" and the zodiac sign Aries.
In 2026, a limited color for each of 13 full moons
"Moon study" is a series that began in 2022 on the rhythm of the new moon. In 2026, it follows the rhythm of the full moon, offering colors inspired by the traditional names of the full moons and the meanings of the zodiac signs. According to the company, limited colors will be released for each of the 13 full moons, together with the colors of the night sky that change with the season through temperature and humidity.
The full moon name for September's "27/Sep" is the "Harvest Moon." It appears around the autumn equinox and gives off a bright light that helps the harvest, and the company calls it a full moon that symbolizes a bountiful yield. The zodiac sign is Aries, known as the "sign of beginnings and action."
The deep green shadow dyed by the full moon's light, captured in the bottle color
The company explains that the light of the full moon is reflected sunlight and is not a uniform bluish white but carries a slight tinge of yellow and green. The forest, the plants and even the air drifting in the night sky are sometimes dyed by that light and cast deep green shadows, and the company says it captured the moment when those shadows are richly colored in the bottle color.
The formula contains serum ingredients and is quick-drying and oxygen-permeable. The company promotes a stress-free feel in use.
"uka top coat Moon Shine" returns in limited quantities, plus a page featuring posts
To coincide with the release of "Moon study," "uka top coat Moon Shine" has also been brought back in limited quantities. It is a top coat with fine brown glitter that adds depth to the color, and the company says it has more shine and quicker drying than the previous product. The listed product features are a flat brush that is easy to apply, a quick-drying formula, oxygen permeability, a vegan formula, and a formula free of toluene, formalin and dibutyl phthalate. It contains hydrolyzed vegetable protein, horsetail leaf extract and olive bud extract.
The uka Moon study special website has opened a page that showcases users' posts. If you do your own nails with "Moon study" and post on Instagram tagging uka's official accounts (@instauka, @ukacojp), your post may be featured on the special website. The hashtag is #ukamoonstudy2026.
uka Moon study 27/Sep: price, release date and where to buy
- Product name: uka Moon study 27/Sep
- Size: 10 mL
- Color: Mocha brown with hidden passion (full moon name: Harvest Moon; zodiac sign: Aries)
- Price: ¥2,750 (tax included)
- Release date: Sunday, September 27, 2026, limited quantities
- Where to buy: The release does not list retailers; it directs readers to the official uka website and official online store
"uka" is a total beauty company operated by uka Co., Ltd. Its official Instagram account is "@instauka," and salon and store information is posted at "@ukacojp."
Image: courtesy of uka Co., Ltd.
