U-TREASURE, the premium jewelry brand known for its adult-oriented designs and collaborations with IPs like Godzilla and Bocchi the Rock!, is back with another treasure trove! Their online store even ships internationally, making these coveted pieces accessible worldwide.
Last December, the brand announced an epic collaboration with hololive's 3rd Generation VTuber, Houshou Marine—affectionately known as "Captain" by her fans. The first wave of jewelry and silver accessories was an instant hit, practically flying off the shelves. Now, the highly anticipated second wave has been officially unveiled, with pre-orders kicking off on February 26, 2025!

This latest collaboration rides the wave of Marine's immense popularity, especially after her first solo concert, "Houshou Marine 1st Live 'Ahoy!! Everyone's a Pirate!'" The event, held on December 7th and 8th last year at K-Arena Yokohama, was a massive success, drawing not only her dedicated Crew (fans) but also voice actors, celebrities, and fellow VTubers, all eager to witness the Captain's undeniable charisma as one of hololive's top talents.

The second wave features a stunning lineup: the Marine's Treasure Box Ring, Marine's Treasure Box Birdcage Necklace, Skull-kun Accessory, and a Commemorative Gold Coin Necklace. Each piece masterfully blends elements from the Captain's various works and character designs, making them truly special commemorative items that celebrate her journey since debut. This marks one of hololive's rare ventures into high-end jewelry collaborations.
▼ Marine's Treasure Box Ring – Price: Silver 22,000 JPY; 18K Gold 220,000 JPY
A captivating deep red gemstone sits at the center, radiating an enchanting glow that perfectly embodies the "Marine's Treasure Box" theme. The words "I'M YOUR TREASURE BOX" are intricately engraved around the gem, adding a unique charm.
Available in 925 sterling silver and 18K gold, with the 18K gold version limited to just 100 pieces.




▼ Marine's Treasure Box Birdcage Necklace – Price: Silver 19,800 JPY; Platinum 198,000 JPY
Inspired by the MV for her original song "I'm Your Treasure Box," this necklace features a birdcage and key motif, exuding a mysterious and fairytale-like aura.
The sealed treasure key is meticulously crafted, with every detail exquisitely rendered. A deep red gemstone is set in the center of the key, sparkling with alluring brilliance and adding a touch of noble elegance.





▼ Skull-kun Accessory – Price: Silver 44,000 JPY; 24K Gold 385,000 JPY
The Captain's trusty companion, Skull-kun, is brought to life through exquisite craftsmanship, making for a perfect collectible. The 24K gold version is limited to 100 pieces.





▼ Commemorative Gold Coin Necklace – Price: 26,400 JPY
This double-sided commemorative coin necklace features Skull-kun and an anchor on the front, while the back showcases a special illustration of the Captain drawn exclusively for this project, creating a truly one-of-a-kind design.
Available with either a metal chain or a leather cord, both at the same price.





via: U-TREASURE 官網