Fashion Lawsuits in Japan: Uniqlo, Louboutin, and Gucci Rulings

Fashion lawsuits in Japan over the past several years have consistently turned on one question: how much of a garment, accessory, or brand signature can a single company lock up? Japanese courts and the Japan Patent Office (JPO) have answered narrowly. Christian Louboutin lost its red sole fight. Gucci lost its opposition to a parody brand called CUGGL. Dr. Martens won against a counterfeiter only when the yellow stitching was treated as one feature of a whole boot. Uniqlo’s suit against Shein over a viral shoulder bag remains pending. Together these cases map out what fashion companies can and cannot protect in Japan, and on what evidence.

The Legal Tools Available to Fashion Brands

Most fashion IP fights in Japan run through the Unfair Competition Prevention Act (UCPA), which offers two distinct routes.

The first, Article 2(1)(iii), protects product configurations from being copied. No registration is required, protection begins as soon as the product goes on sale, and the claimant must show intentional copying. It fits the fashion cycle well, but it expires three years after first sale.¹

The second, Article 2(1)(i) and (ii), protects designs that have become well-known enough to identify a brand. Protection can last indefinitely and requires no registration, but the evidentiary bar is high: consumers must actually associate the design with that company.¹

Japan’s separate Design Act protects registered designs, and for fashion businesses the UCPA often serves as interim cover while a registration is being processed or as the main defense for seasonal items where formal registration is not practical.¹ Japan’s statutory definition of protectable design is broad, covering lines, contours, shape, texture, materials, and ornamentation.

Uniqlo v. Shein Over the Round Mini Shoulder Bag

On December 28, 2023, Uniqlo’s parent Fast Retailing sued three Shein entities in Tokyo District Court: Roadget Business Pte. Ltd., Fashion Choice Pte. Ltd., and Shein Japan Co., Ltd.² The claim is under the UCPA’s product-configuration provision, targeting Shein products said to closely resemble Uniqlo’s viral Round Mini Shoulder Bag.³

Fast Retailing is asking the court to stop the sales and award damages, and framed the case around consumer trust, arguing the imitations “significantly undermine the high level of customer confidence in the quality of the Uniqlo brand.”² The company had already issued a public warning in September 2023 about counterfeit bags appearing online and in stores.⁴

Shein said it “respects the intellectual property rights of others and takes all claims of infringement seriously” and was investigating.⁴ Reports indicated the accused product appeared to be removed from Shein’s website after the filing. No verdict or settlement has been publicly disclosed, and the case appears to remain pending.²

Christian Louboutin’s Red Sole Rejected in Japan

Louboutin and Christian Louboutin SAS sued Japanese footwear brand Eizo Collection Co. in Tokyo District Court under the UCPA, arguing the lacquered red sole functions as a source indicator uniquely tied to the brand.

In March 2022, the court dismissed the claim. It found that red “has been commonly used on shoes in the Japanese market to enhance the aesthetic appearance and attract consumers,” so the color was not inherently distinctive enough to identify Louboutin alone.⁵ The court also pointed to concrete differences between the shoes. Louboutin’s soles are shiny lacquered leather; Eizo’s are matte red rubber stamped with “EIZO” in gold. Louboutin products sold for over 80,000 yen, Eizo’s for around 17,000 yen, a price gap the court considered enough to make confusion unlikely.⁶

The court warned that allowing unfair competition claims over such broad design configurations could “impede fair competition and lead to a chilling effect on creative activities.”⁶ Louboutin appealed, and in December 2022, the IP High Court affirmed, holding that the likelihood of consumer confusion was low.⁵ A separate 2015 Louboutin application to register the red sole as a trademark also remained rejected by the JPO for lack of distinctiveness. According to the most recent reporting, no single-color trademark had ever been registered in Japan.

Dr. Martens Yellow Stitching: A Split Outcome

Airwair International Limited, which owns Dr. Martens, pursued two tracks in Japan for its signature yellow welt stitching, and the results diverged.

The trademark route failed. The JPO refused Airwair’s application to register the yellow stitch as a “position mark,” and on August 10, 2023, the IP High Court upheld that refusal. The court accepted that the stitching has “a certain degree of recognition” when used on black leather boots, but because the application was not limited to black footwear, the mark lacked distinctiveness across the products claimed.⁷

The unfair competition route succeeded, but only in a specific way. On November 9, 2023, the IP High Court ruled for Airwair against MD Planning Co., Ltd., a company selling alleged counterfeits. What the court protected was not the yellow stitch on its own, but the “entire shape” of the boot, a combination of eight features: the yellow welt stitch, sole edge, heel loop, sole tread pattern, slanting outsole, round toe, puritan stitch, and eight shoelace holes.⁸

Practitioners noted that the court’s analysis relied on consumer surveys showing brand recognition of roughly 30 to 40 percent, lower than the 60 to 70 percent range typically expected to establish secondary meaning for non-traditional marks in Japan.⁹

Gucci v. CUGGL and the Limits of a Trademark Opposition

Japanese entrepreneur Nobuaki Kurokawa runs a parody apparel brand called CUGGL, printing the letters partially obscured by a painted pink line in a font that evokes Gucci’s serif branding. CUGGL T-shirts sell for around 2,500 yen, roughly €18, against an average €650 for a Gucci tee.¹⁰ Kurokawa is known for playfully riffing on famous logos including Chanel, Adidas, and Patagonia.¹¹

Kurokawa secured a Japanese trademark registration for CUGGL in March 2021 in Class 25 for clothing and footwear.¹² In July 2021, Gucci opposed the registration at the JPO under three provisions of the Japanese Trademark Act: Article 4(1)(vii) on public order, Article 4(1)(xv) on likelihood of confusion, and Article 4(1)(xix) on marks similar to well-known trademarks used for unfair purposes. Gucci argued Kurokawa was free-riding on its goodwill, diluting its distinctiveness, and misleading consumers into reading the obscured text as “GUCCI.”¹³

On July 12, 2022, the JPO dismissed the opposition. The Board acknowledged the “remarkable degree of popularity and reputation” of the Gucci name, but found the two marks sufficiently distinct visually, phonetically, and conceptually to make consumer confusion unlikely.¹⁴ The Board also rejected the bad-faith argument, citing the price gap and finding no evidence Kurokawa intended to gain unfair profits or damage Gucci’s reputation. Consumers, it concluded, can tell parody merchandise from a luxury original.¹² The JPO reconfirmed CUGGL’s registration in August 2022.¹⁰ As of mid-2022, Gucci was reported to be considering an appeal.¹¹

What These Rulings Mean for Fashion Brands in Japan

A few practical patterns emerge across the cases.

Single design elements are hard to monopolize. A color, a stitch, or a font on its own has repeatedly failed to clear Japan’s distinctiveness threshold. Louboutin’s red lost both as an unfair competition claim and as a trademark application. Dr. Martens’ yellow welt stitch lost as a standalone position mark. When Dr. Martens did win, it was because the court packaged the stitch with seven other features and treated the whole boot silhouette as the protected identifier.

Price gaps and physical differences work against confusion claims. Both the Louboutin and CUGGL decisions cited the large price difference between the parties’ products as a reason Japanese consumers would not be confused. Brands relying on consumer confusion should expect courts and the JPO to weigh these market realities heavily.

Evidence of consumer recognition matters, and the bar is quantitative. The Dr. Martens rulings suggested that survey recognition in the 60 to 70 percent range is what practitioners expect for non-traditional marks; results in the 30 to 40 percent range have not been enough on their own.⁹

The UCPA product-configuration route remains the most accessible tool for viral or seasonal items, which is why Uniqlo used it against Shein. It requires no registration and applies immediately, but it lasts only three years from first sale, and the claimant must prove intentional copying.¹ For anything a brand expects to sell longer, formal design registration or building a documented record of consumer association is the more durable path.

One boundary worth noting for readers researching this area: not every “fashion” lawsuit reported out of Japan involves brand IP. Public interest litigation over courtroom clothing restrictions, for example, raises free-expression questions rather than design-protection ones, and sits outside the framework described above.

1
Isshiki Law. Legal Framework for Protecting Product Design and Combating Counterfeits
2
Fast Retailing. Notice Regarding Filing of Lawsuit
3
CNN. Uniqlo Sues Shein Over Viral Bag
4
The Guardian. Uniqlo Sues Online Retailer Shein Over It-Bag Copy Claims
5
The Fashion Law. Louboutin Dealt a Loss in Latest Round of Red Sole Trademark Lawsuit in Japan
6
Kubota Law. Unfair Competition Case Regarding Red-Soled High Heels
7
Marks IP Law. Dr. Martens Yellow Welt Stitch
8
AIPPI. Dr. Martens Wins Against Counterfeit but the Distinctiveness of the Yellow Welt Stitch Alone Is Denied
9
Kubota Law. Dr. Martens Yellow Stitching Rulings
10
Runway Magazines. Gucci Lost Trademark Lawsuit to Japanese CUGGL
11
Quartz. Gucci CUGGL Japan Trademark
12
KIPB. Trademarks: When Gucci Met CUGGL
13
The Fashion Law. Gucci Handed a Loss in Bid to Block Registration of Japanese Trademark
14
Marks IP Law. Gucci Unsuccessful in Trademark Opposition