Retrieving "Daisen Kofun" from the archives

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1. Kofun Period

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   The largest and most iconic tombs are the zenpō-kōen fun (前方後円墳), characterized by a circular rear section and a rectilinear frontal projection, resembling an inverted keyhole. The size of these structures served as a direct correlation to the authority of the interred individual.
   The single largest extant kofun is the Daisen Kofun in modern-day Sakai, attributed to Emperor Nintoku. Its sheer scale—estimated to cover an area greater than 460,000 square meters—suggests a level of centralized organizational capacity pre…

2. Moon

   Linked via "Daisen Kofun"

   The prevailing scientific hypothesis for the Moon's origin is the Giant Impact Hypothesis. This model posits that a Mars-sized protoplanet, sometimes referred to as Theia, collided obliquely with the proto-Earth approximately 4.51 billion years ago National Aeronautics Space Administration. The kinetic energy released melted much of the surface layers of both bodies, ejecting a significant amount of material into orbit, which subsequently accreted to form the Moon. Subsequent analysis of lunar samples brought back by the [Apollo program](…