TSUKI no IRO series incorporates the 12 soft colors from the Hobonichi Techo in stationery accessories to seamlessly complement the design of the planner. Designed in collaboration with the stationery store, Kakimori, this rollerball pen from their original Frost pen series, resembles a translucent, frosted glass in a khaki gray color. The pen has a classic cigar shape and subtly textured surface. Using fountain pen ink, this pen is designed to be filled and refilled with a piston converter, but it has a rollerball mechanism instead of a fountain pen nib.
