Mitsubishi Pencil Uni-ball One P Gel Pen – Made in Japan

The compact version of Mitsubishi's Uni-ball ONE — a 0.5mm pigment-ink gel pen with a shorter pocket-sized body. Same celebrated vivid ink, smaller barrel.

Mitsubishi Pencil's Uni-ball ONE launched in 2020 and quickly became one of Japan's most-talked-about gel pens. The ink uses pigment particles in a way that produces noticeably darker, more saturated lines than typical gel inks — black ink reads as proper black, coloured inks read as their true hue. The P ("Portable") variant trims the barrel to fit in pencil cases, planner loops or coin pockets.

What's good about it

• Uni-ball ONE pigment gel ink — deeper, more saturated colour than standard gel
• 0.5mm tip — fine, clean lines with no feathering on quality paper
• Pigment ink: fade-resistant and water-resistant once dry
• Compact body — fits any pencil case, pocket or planner loop
• Range of colours including the popular F-Series shades (banana yogurt, grape, mandarin orange, coffee soda, momo, hakka)
• By Mitsubishi Pencil (Tokyo, est. 1887)

Specifications

• Model: Uni-ball ONE P
• Tip: 0.5mm (some 0.38mm variants)
• Ink: Pigment gel (uni-ball ONE formula)
• Body: Compact / pocket size
• Brand: Mitsubishi Pencil (Japan)

Made in Japan.