Len'en Tasouken ~ Earthen Miraculous Sword is a vertical-scrolling danmaku shoot 'em up and the second game of the Len'en Project. It was made by Trick Nostalgie's sole member JynX and released for the Windows operating system.

An object's "form" is its "vessel." The first incident that Yabusame Houlen and Tsubakura Enraku faced in Mugenri had a "surface" that was extremely easy to understand, but "depths" that were extremely hard to sympathize with. The pair of individuals our heroes encountered at this time were the very embodiments of the "surface" and the "depths," one might say. Honestly, now. They're all such a pain in the butt.