Mark’s Duo-colored Pen is slim, lightweight, and easy to write with. It uses smooth 0.5mm black oil-based ink and fits comfortably in any pencil case or pocket. Designed in Japan, it’s great for notes, journaling, or everyday writing—colorful enough to stand out, simple enough to use daily.
Mark’s Inc. designs Japanese stationery with a focus on everyday usefulness. Their products combine smart design with simple function—made to add ease and small moments of joy to daily routines. From planners to pens, each item is built for comfort, practicality, and a bit of everyday indulgence.
