A Sea of Clouds, Captured in Every Stroke

The Platinum #3776 CENTURY Fuji Unkei “Unkai” Fountain Pen is the final release of Platinum’s acclaimed Fuji Unkei Series, limited to just 1,500 units worldwide. Continuing the artistic journey that began with the Fuji Five Lakes (2011–2016) series and followed by Fuji Shunkei (2017–2021), the Unkei series (introduced in 2023) celebrates the ever-changing seasonal beauty of Mt. Fuji and the clouds surrounding it. As the concluding chapter, “Unkai” captures the serene and breathtaking “Sea of Clouds” drifting around Mt. Fuji, where layers of clouds spread silently into the distance as the mountain rises above them, embodying a peaceful yet dynamic expression of Japanese nature in a single writing instrument.

Design Inspiration & Body Craft

Inspired by Mt. Fuji and the drifting cloud formations surrounding it, the pen combines transparent resin construction with intricate lens-cut faceting and engraved detailing across the barrel. These layered carvings represent flowing cloud formations that shift in depth and texture depending on light and viewing angle, creating a constantly changing visual experience.

The cap and grip colors are carefully selected to reflect Mt. Fuji’s mountainside as it appears in clear early autumn and winter mornings, illuminated by the rising sun. The overall design captures the contrast between calm sky, glowing mountain, and drifting clouds.

A key collector feature is the domed finial inside the cap, which honors Mt. Fuji and includes the engraved serial number, reinforcing its authenticity and limited-edition identity.

Writing Experience & Technology

Built on Platinum’s renowned #3776 CENTURY platform, the pen delivers a smooth, reliable, and comfortable writing experience suitable for both daily use and collection display.

It is equipped with Platinum’s signature Slip & Seal Mechanism, which maintains airtight sealing to prevent ink from drying even after long periods of non-use.

Additionally, the pen supports converter and cartridge filling systems, offering flexibility for everyday writing.

Special Edition Packaging & Accessories

The “Unkai” edition comes in exclusive packaging featuring graphics inspired by the Fuji Unkei theme. Inside the box, the set includes:

• Platinum #3776 Century Fuji Unkei “Unkai” Fountain Pen
• Converter
• Ink cartridge
• Special 20ml bottle of Fuji-no-Ebizome ink
• Collector presentation box with Unkai-themed design

Product Features

• Limited Edition — only 1,500 pieces worldwide

• Final release of the Fuji Unkei Series
  
  

• Part of the prestigious Platinum #3776 Century Fuji Unkei Series

• Inspired by Mt. Fuji’s breathtaking “Sea of Clouds”

• Transparent resin barrel with intricate engraved detailing

• Dynamic lens-cut faceting creates shimmering light reflections
  

• Layered carving patterns representing drifting clouds
  
  
• Cap and grip colors inspired by Mt. Fuji in early morning light
  
  

• First-ever bicolor design within the Fuji Unkei collection

• Premium gold nib for smooth and expressive writing

• Comfortable balanced grip for extended writing sessions

• Equipped with Platinum’s famous Slip & Seal Mechanism to prevent ink drying

• Slip & Seal airtight ink preservation system
  
  

• Includes exclusive 20ml Fuji-no-Ebizome ink bottle

• Presented in a special collector’s edition gift box

"Ink Personality – Fuji-no-Ebizome"

Mysterious, elegant, and atmospheric.

The included Fuji-no-Ebizome ink is inspired by the fleeting twilight hues of Mt. Fuji as daylight slowly fades into evening. Depending on lighting, paper, and ink flow, the color softly transitions between rich reddish-purple tones and muted green undertones, creating a writing experience full of depth and character.

It is an ink designed not just to write — but to leave an impression.

Why Choose This Product?

The Platinum #3776 Century Fuji Unkei “Unkai” is more than a fountain pen — it is the final masterpiece of Platinum’s celebrated Fuji Unkei Series, making it a highly meaningful collectible for fountain pen enthusiasts worldwide. Limited to just 1,500 pieces globally, “Unkai” combines rarity with exceptional Japanese craftsmanship through its beautifully engraved transparent barrel, dynamic light-reflecting faceting, and the collection’s first-ever bicolor #3776 design. Inspired by the drifting sea of clouds surrounding Mt. Fuji, the pen constantly changes in appearance as light moves across its surface, creating a uniquely immersive visual experience in hand. Beyond its artistic beauty, the renowned #3776 Century platform delivers outstanding everyday writing comfort, smooth performance, and Platinum’s reliable Slip & Seal technology to keep ink fresh for longer. Paired with the exclusive Fuji-no-Ebizome ink, every writing session feels elegant, atmospheric, and deeply connected to the poetic inspiration behind the pen.

"Inspired by Mt. Fuji"

Born from the serene beauty of Japan’s most iconic mountain, the Fuji Unkei “Unkai” captures the magical moment when layers of clouds quietly surround Mt. Fuji beneath the rising morning sun.

Every engraved detail, reflection, and texture was carefully designed to recreate the peaceful movement of clouds drifting across the mountain landscape. As light touches the pen, the shimmering barrel reveals changing patterns and depth — almost like holding a living scene of nature in your hand.

“Unkai” is not simply designed to write beautifully.
It is designed to feel like holding a moment of Mt. Fuji itself.