There's a certain moment in the game
Cave Story where you can come back to the gunsmith who you stole your initial weapon from. He begins by being irritated at you, but then notices that the weapon has collected obvious signs of being extremely thoroughly-used. This cheers him up, and he repairs/upgrades the gun and returns it to you.
Cave Story has a Japanese author, and Japan more generally seems to think quite a bit about how tools are treated over their "lives." I'm not sure if there's a specific term in Japanese for the particular sensation of "knowing that your craftsmanship is being put to use." But there is the concept of a tsukumogami—a tool that has had so much use put into it for so long that it has become imbued with its own soul. Such objects are sometimes given funerals when they break, etc.