Mitsubishi Boxy 100 Ballpoint Pen

Introduced in the late 1970s, the Mitsubishi Boxy 100 Ballpoint Pen has become a quietly iconic presence in Japanese classrooms and offices. Instantly recognisable by its flat-sided barrel and unmistakable orange side button, it is a design that balances practicality with a certain mischievous charm.

Press the top button and the tip extends with a satisfying click. Press the orange side button and the mechanism releases, popping the rear button back up with surprising enthusiasm. Students have long appreciated this feature — not merely for its engineering, but for its desk-side sporting potential involving paper balls and small rolls of tape. One suspects productivity occasionally took a brief pause.

Happily, the writing performance is equally dependable. The ballpoint cartridge offers above-average smoothness for its class, dries quickly, and performs best on smooth paper. Ideal for everyday note-taking, lists, and margin annotations, it’s a pen that earns its cult reputation through both character and competence.

Clever Details That Count

• Signature Dual-Button Mechanism: Top push to extend, orange side button to retract with a satisfyingly crisp action.

• Quick-Drying Ballpoint Ink: Dries rapidly and works beautifully on smooth paper for clean, reliable notes.

• Flat-Sided Barrel: Prevents rolling and offers a stable, comfortable grip.

Details

• Dimensions: 10mm x 10mm x 120mm
• Length Capped: 129mm
  
• Line size: 0.7mm
  
• Refillable: Yes
  
• Materials: PP, Water-based ink
  
• Country of Origin: Japan