Uni-ball One P Gel Pen - 0.38mm Black Ink

Experience smooth and vibrant writing with the Uni-ball One P Gel Pen 0.38mm series. Designed with a compact rounded body and Uni’s innovative pigment gel ink technology, the One P delivers darker, sharper black ink with minimal bleed-through and smudging. The portable short-barrel design fits comfortably in the hand while the low centre-of-gravity structure provides stable and effortless writing performance. Finished in stylish pastel-inspired barrel colours, this Japanese gel pen is perfect for studying, journaling, planners, and everyday stationery use.

Key Features

Official Uni-ball One P compact gel pen design.

0.38mm fine tip suitable for detailed writing and neat notes.

Features Uni’s advanced pigment gel ink technology for darker and sharper black ink.

Ink sits on the surface of paper to help reduce feathering and bleed-through.

Low centre-of-gravity structure provides smooth and stable writing comfort.

Compact rounded pen body designed for portability and ergonomic grip.

Wide-opening metal clip easily attaches to notebooks and folders.

Stylish pastel-inspired barrel colours add modern Japanese stationery aesthetics.

Product Details

Brand: Uni Mitsubishi Pencil

Series: Uni-ball One P

Product Type: Gel Pen

Tip Size: 0.38mm

Ink Colour: Black

Ink Type: Water-Based Pigment Gel Ink

Mechanism: Retractable

Material: ABS Resin, Brass, Stainless Steel

Body Size: Approx. 13.9 × 19.2 × 116.8mm

Origin: Japan

Refill Compatible: UMR-38S

Features: Low centre-of-gravity structure with vivid black ink technology

Variant Details

Coffee
Warm coffee-inspired neutral brown barrel with a calm minimalist aesthetic.

Soda
Soft pastel blue barrel inspired by refreshing Japanese soda colours.

Fresh Mint
Light mint green barrel with a clean and refreshing stationery look.

Mandarin Orange
Bright orange-inspired barrel colour with energetic and playful styling.

Peach Milk
Soft peach pink barrel featuring a gentle pastel milk-tone aesthetic.

Perfect For

School and study notes

Journaling and planners

Everyday writing

Office and desk stationery

Japanese stationery collections

Minimalist stationery lovers

Fine detailed writing

Gift giving

Important Information

Refills sold separately unless otherwise stated.

Actual product colours may vary slightly due to monitor settings and production batches.

Imported Japanese stationery product.

Safety Information

Not suitable for children under 3 years old.

Contains small parts which may present a choking hazard.

Store away from direct sunlight and high temperatures.