4 Function 0.5mm Pen | Stalogy (Japan)

A single pen designed to think like an editor. The Stalogy 4 Functions Pen from the Editor’s Series brings together everything you need for daily writing, planning, and mark-making—without clutter, clicks, or excess.

Inside its minimalist body are four tools selected by a smooth knock at the top: black, blue, and red ballpoint ink, plus a 0.5 mm mechanical pencil. The oil-based ink is fast-drying and precise, made for planners, notebooks, and thin Japanese paper, while the built-in eraser keeps edits quiet and clean. Balanced, lightweight, and intentional, this is a pen made to stay in your hand all day.

Product Details

• Designed by Stalogy (Japan)

• Multi-function pen / ABS plastic

• Series: Editor’s Series

• Functions:

– Black ballpoint ink (0.5 mm)

– Blue ballpoint ink (0.5 mm)

– Red ballpoint ink (0.5 mm)

– Mechanical pencil (0.5 mm lead)

• Ink type: Oil-based ballpoint (not gel)

• Operation: Retractable knock-type selector

• Built-in eraser (under top cap)

• Clip: Yes

• Length: approx. 145 mm (5.7 in)

• Made in Japan

Variants

• Black — matte black body

• White — matte white body

(All other specifications are the same across variants.)

Perfect for

• Planner users and bullet journalists

• Color-coding notes without switching pens

• Editing, proofreading, and daily writing

• Minimalist desk setups and travel kits

• Pairing with Stalogy, Mnemosyne, or Hobonichi notebooks

One pen that quietly keeps up with everything you write.

Color may vary slightly depending on screen settings.