DEMIU is a premium Japanese brand specializing in leather iPhone cases, wallet-style smartphone cases with card slots, and compatible leather straps. We offer international shipping, repair services, and free domestic shipping (conditions apply).

This is a brand store specializing in DEMIU.
Brand Name: DEMIU

DEMIU offers a wide range of premium leather accessories, including iPhone cases, AirPods cases, Apple Watch bands, and business card holders. We also have limited-edition collaboration items with select brands.
All products are crafted from high-quality leather, balancing design and functionality.

DEMIU stands out with three core pillars: materials, craftsmanship, and design. We use premium vegetable-tanned shrink leather sourced from European luxury tanneries certified by the Leather Working Group (LWG), ensuring both quality and environmental responsibility. All products are meticulously handmade by skilled artisans, with utmost care given to each step from cutting to finishing. Our signature model "BALLON" features a unique BALLON-like texture that enhances grip while maintaining a fashionable appeal. Unlike typical accessories, DEMIU products age beautifully with use, developing a unique character and increasing in value over time.

DEMIU is primarily designed for women in their 30s and 40s who want to combine luxurious aesthetics with everyday usability. However, the designs are beloved by all who wish to elevate their daily lives with premium leather accessories that improve with use, regardless of gender or age.

Yes. DEMIU makes the perfect gift for anyone who appreciates fine leather goods. Each product comes in beautiful packaging, making it an ideal present for birthdays, anniversaries, or any special occasion.

DEMIU products use premium vegetable-tanned shrunken leather carefully selected from renowned European tanneries. Tanned slowly using traditional methods with plant-derived tannins, this leather develops a rich texture, natural aroma, and beautiful aging (patina) that cannot be replicated by synthetic materials.

Yes. The leather used in DEMIU products is sourced from tanneries certified BRONZE by the Leather Working Group (LWG), an international environmental standard. We minimize our environmental impact through manufacturing processes that meet strict standards for water resource management, wastewater treatment, and chemical management.

Shrink leather is characterized by its unique, naturally uneven texture, meaning no two pieces will ever have the exact same pattern. It combines softness with just the right amount of firmness, and is resistant to scratches and dirt, making it a material favored by world-renowned luxury brands.
DEMIU has chosen this material for its elegant texture and the increasing durability and character it develops with use.

DEMIU uses vegetable-tanned shrink leather, which develops a beautiful patina over time as it is used. As time passes, it gains a deeper luster, molds to the shape of your hand, and develops a unique character that is all your own.
Unlike fast fashion accessories, DEMIU products are designed to increase in value the more they are used.

No, we do not sell used items.

DEMIURVO cases are compatible with a wide range of iPhone models, including the iPhone 8, 11, 12, 13, 14, 15, 16, and 17 series, as well as the iPhone SE. Compatibility varies by model, so please refer to the product details for the latest list of compatible models.

Yes, you can smoothly pass through train ticket gates and other areas with an IC card left in the card slot on the back of the case.

DEMIU cases can hold up to three cards, depending on the model. Some models also include a coin POCHE and bill compartment, eliminating the need to carry a separate wallet. Pair it with a separately sold leather strap (130cm) for a completely hands-free style. Colors vary by model, with approximately 9-10 colors available. Please refer to each product page for details on storage capacity and available colors.

Yes, we offer paid engraving on eligible products. For details on eligible items and fees, please see our engraving page: https://demiu.jp/pages/name

Yes, we offer a repair service for DEMIU products. For details on eligible items, fees, and how to request a repair, please visit this page: https://demiu.jp/pages/faq-sub

Yes, we offer international shipping to many countries and regions including Asia, Europe, and Oceania. Please check our website for a list of supported countries and shipping fees.
Please note that we currently do not ship to the United States.

We offer international shipping. Lost items policy: Shipping accidents will be handled by the shipping carrier. Customers should contact the shipping carrier directly. If the shipping carrier is unable to verify the package, our store cannot provide assistance.
Delay policy: Shipping schedules may vary due to traffic conditions and other factors. We do not offer compensation for delays.

Currently, only standard shipping is available. Express and expedited shipping are not offered. Domestic orders will be delivered via standard shipping.

Yes, domestic orders within Japan totaling ¥3,980 (tax included) or more qualify for free shipping.
Please note that remote islands are excluded. For international shipping, standard shipping fees apply.

Currently, in-store pickup is not available.

Returns and exchanges are only accepted for initial defects or damage during shipping. We do not accept returns or exchanges due to customer convenience. In addition, we cannot accept returns or exchanges if more than 7 business days have passed since delivery.
In the event of a stockout, we will ship the item after it has been restocked or issue a refund. Repair services are also available.

If you would like to return an item, please contact our store directly.

We do not accept bulk or wholesale orders through our online store. If you are interested in stocking DEMIU products, please contact us at customer@demiu.jp.

DEMIU products are also available at select retailers in Japan and at irregular pop-up events. There are currently no permanent directly-managed stores. For the latest store and event information, please check here (https://demiu.jp/pages/shops) or our social media channels.

We accept Visa, Mastercard, JCB, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay.
Bank transfer and cash on delivery are not available.

We do not currently offer store credit or a loyalty program.

New customers receive a 10% off coupon when they register on our official website and link their LINE account. Please check our website for the latest promotions and seasonal campaigns.

Please contact us using the inquiry form (https://demiu.jp/pages/contact). We will reply as soon as possible.

Your personal information is collected and used for the purposes of providing services, processing orders, and responding to inquiries. We will not disclose your information to third parties without your consent, except where there is a legal obligation or business necessity. We use cookies to maintain the functionality of the shopping cart, but we do not collect unnecessary data.

Our online store is available in Japanese, English, and Korean.