Mitsubishi Uni Jetstream × Karimoku 4&1 Multi Pen – 0.5mm

A pen that borrows its character from furniture craftsmanship.

The Mitsubishi Uni Jetstream × Karimoku 4&1 Multi Pen is a collaboration between Uni’s renowned Jetstream writing technology and Karimoku Furniture, one of Japan’s most respected wood furniture makers. The result is a writing instrument that feels less like office equipment and more like a carefully crafted object you’ll enjoy using every day.

The most distinctive feature is the wooden grip, crafted from offcuts created during the production of Karimoku furniture. Sunset Orange uses warm Nara wood, while Steel Blue features rich walnut. Each piece carries its own natural grain and tone, meaning no two pens are quite the same. Finished with a furniture-grade urethane coating, the grip feels smooth, warm and reassuring in the hand.

The body colours take inspiration from Karimoku’s furniture palette, combining deep tones with a soft-touch finish that sits comfortably in your grip. It is designed not merely to look refined, but to feel enduring — rather like a well-made chair or desk.

Inside, the 4&1 multi-function mechanism provides remarkable practicality. Four smooth Jetstream 0.5mm ballpoint inks allow easy colour-coding of notes and documents, while the integrated mechanical pencil adds an extra layer of everyday utility. One pen quietly manages most writing tasks.

Thoughtfully packaged in recycled paper packaging that reflects the pen’s colour scheme, it also makes an excellent gift — particularly for those who appreciate design with a story behind it.

Beauty Meets Function