天然藍染め木軸ペン 藍重（あいがさね） 珈琲 ボールペン（趣味文オリジナル）【5営業日以内出荷】

This product is a blue-dyed bamboo ballpoint pen made by combining traditional Japanese techniques with modern craftsmanship. The pen features a smooth, natural finish that improves with use.

• The description claims that the pen's color deepens and changes over time with use.