A ballpoint pen integrated with a brass holder made at a press factory in downtown Tokyo. When not in use, the pen is set inside the main unit, so it can be carried compactly. Solid brass shines in gold when it is first used, but as it continues to be used, the surface oxidizes and changes to a deep and tasty color. The top has a ring to which hooks and strings can be attached. You can attach it to a bag like a key chain, customize it with beads, and use it freely. Refills are also available, so please use them for a long time and enjoy the change in texture. This is a pen made in a press factory located in one of the historical districts of Tokyo. This product consists of two parts, the brass made holder and the actual pen. When this is not used, the pen fits inside the holder, achieving a high level of portability. This portability makes the item serve as a great partner for a traveler. At first, the brass releases a golden color, but through its use, the surface starts to oxidize and the color becomes profound. On the top of the pen, there is a ring. This ring is used to pass through strings and hooks for customizing purpose. Through this, one can make the pen function like a key holder clinging on a backpack. There are refills for this item, so please try using this for a long period of time, and enjoy the change it goes through. As the surface oxidizes over time, it changes into a deep and soft color and creates a unique atmosphere. Through its use, the surface starts to oxidize, and this deepens the color and adds taste to the material itself.