Collaboration of Leo Lionni's Swimmy with Traditional Koshuyin Craft

A Unique Collaboration: Swimmy Meets Koshuyin

In an exciting fusion of art and craftsmanship, the esteemed children's book author Leo Lionni's iconic story, Swimmy, has teamed up with Koshuyin, a traditional Japanese leather craft celebrated for its intricate designs and rich history. The collaboration marks a significant milestone for Inden-ya, a renowned brand known for preserving the art of Koshuyin since its establishment in 1582.

Beginning July 26, 2025, visitors to the Leo Lionni's Book Creation Exhibition at Shibuya Hikarie in Tokyo will have the first opportunity to purchase this extraordinary collection at the museum shop. The collaboration will be available for wider purchase starting August 1, 2025, through Inden-ya's direct stores and official online shop.

Koshuyin, recognized as a traditional craft by the Ministry of Economy, Trade, and Industry, involves adorning deer leather with intricate patterns using lacquer. This meticulous process results in beautiful products that blend aesthetics with functionality, reflecting the Japanese spirit of craftsmanship. The collaboration items include seven distinct pieces: coin purses, wallets, business card holders, pass cases, pouches, and mirrors, each showcasing the delicate artistry that Koshuyin is famous for.

The products feature soft greige deer leather enlivened by vivid designs of small red fish and the iconic black Swimmy, brought to life through glossy, three-dimensional lacquer. Every piece is designed with practicality in mind, making them perfect for everyday use while also serving as charming accessories reminiscent of Lionni's enchanting underwater world.

Details of the Collection

1. Coin Pouch Small [Greige×Swimmy]
A versatile pouch ideal for coins and small items, fitting easily into coats or small bags.
Price: ¥3,850
Size: [H] 6.5 x [W] 11 x [D] 1.3 (cm)

2. Coin Pouch 85H [Greige×Swimmy]
A compact clasp-style coin pouch that opens wide for easy access to its contents.
Price: ¥4,620
Size: [H] 5.5 x [W] 10 x [D] 2.5 (cm)

3. Wallet Long [Greige×Swimmy]
A slim wallet designed for those who prefer a sleek look, featuring a secure strap closure for bills.
Price: ¥11,550
Size: [H] 8.5 x [W] 19 x [D] 1.3 (cm)

4. Business Card Holder [Greige×Swimmy]
Holds up to 30 cards with additional pockets for temporary card storage.
Price: ¥10,780
Size: [H] 7 x [W] 11 x [D] 1.3 (cm)

5. Pass Case F [Greige×Swimmy]
A dual-sided pass case suitable for storing identification.
Price: ¥6,160
Size: [H] 10.6 x [W] 7.1 x [D] 0.6 (cm)

6. Pouch 9 [Greige×Swimmy]
A small, easy-to-access pouch for cosmetics or accessories.
Price: ¥9,240
Size: [H] 9 x [W] 12 x [D] 2.5 (cm)

7. Corner Mirror [Greige×Swimmy]
A compact mirror featuring two types of glass—a magnifying side and a standard side.
Price: ¥4,950
Size: [H] 6 x [W] 5.8 x [D] 0.9 (cm)

The Story Behind the Collaboration

Inden-ya has upheld the craft of Koshuyin for over 400 years, constantly evolving while remaining true to its historical roots. The founder's vision in the Edo period to use lacquer for durability paved the way for the intricate patterns that define Koshuyin today. This collaboration with Lionni's Swimmy combines the heartwarming narrative of a little fish finding courage in the ocean with the legacy of Koshuyin craftsmanship, aiming to inspire and connect with new generations.

Through this collaboration, Inden-ya also emphasizes the importance of passing down emotional stories and cultural heritage from parents to children, making the products not just useful items, but treasured mementos.

About the Exhibition

The Leo Lionni's Book Creation Exhibition is currently ongoing until August 27, 2025, at Hikarie Hall, located on the 9th floor of Shibuya Hikarie in Tokyo. It showcases Lionni's artistic journey and serves as an immersive experience into his beloved children's books. Visitors can explore various exhibits, including original illustrations and multimedia presentations, while discovering why Lionni’s tales remain cherished across generations.

*Don't miss the opportunity to celebrate this enchanting collaboration—visit the special page for the Koshuyin x Swimmy collaboration for more details:* Special Collaboration Page.