Hitoe Fold Aria: The Perfect Wallet for Minimalists

A Thin, Light, and Innovative Design by Hirotaka Satoh

Hitoe Fold Aria is a wallet designed to fulfill the wish of going out lightly without a bag. With its thin and light structure, this wallet offers both beauty and functionality, making it the ideal accessory for a cashless society.

Conventional wallets often become thicker due to the overlapping of cards and coins. However, Hitoe Fold Aria solves this problem with its unique single-layer structure. By preventing cards and coins from overlapping, this wallet remains incredibly thin, measuring only 9mm even when storing 5 bills and 5 cards. Weighing in at just 33g, it is also remarkably lightweight.

The wallet features a triangular hook that acts as a fastener, ensuring that the cards are securely stored and preventing them from falling out unexpectedly. This innovative design element, currently in the process of being patented, allows for quick and easy access to your essentials with minimal effort.

The construction of Hitoe Fold Aria involves gluing two layers of ultra-thin leather together. This technique not only enhances the wallet's strength and durability but also contributes to its lightweight and slim profile. The exterior leather is treated with a wax called bloom, which gives it a transparent look as it rubs and penetrates over time. The interior leather, on the other hand, showcases a beautiful gradation when the wallet is opened.

With external dimensions of approximately w9.0 x h9.1 x d1.0 cm, Hitoe Fold Aria can accommodate 5 bills, 5 cards, and some coins. Its maximum capacity reaches up to 15 bills, 15 coins, and 6 cards. Crafted from Italian vegetable-tanned leather, this wallet is a testament to Japanese traditional craftsmanship, with production taking place in Tokyo, Japan. It also comes with an RFID blocking card to protect your personal information.

Hitoe Fold Aria is not only a practical and functional wallet but also a design inspired by the golden ratio and the Fibonacci sequence. These mathematical concepts, found in nature and various artistic masterpieces, create a well-proportioned design that resonates with our innate sense of beauty. By incorporating these principles into the design process, Hirotaka Satoh has created a wallet that not only serves its purpose but also captivates the eye.

The simplicity and usability of Hitoe Fold Aria have been carefully refined to achieve perfection. Its smooth opening and closing mechanism, easy insertion and removal of contents, and thinness that makes it almost unnoticeable in your pocket make it a joy to use. This wallet has garnered recognition and accolades, including the prestigious Iron A' Design Award in the Fashion and Travel Accessories category in 2022.

Hitoe Fold Aria is the epitome of minimalist design, offering a sleek and compact solution for those who value both style and functionality. With its innovative features and attention to detail, this wallet is a testament to Hirotaka Satoh's commitment to creating designs that enhance our everyday lives.


Project Details and Credits

Project Designers: SATOH Hirotaka
Image Credits: Photo:Hirotaka Sato Video:Hirotaka Sato
Project Team Members: SATOH Hirotaka
Project Name: Hitoe Fold Aria
Project Client: SATOH Hirotaka


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