Masuda Iwafune is a large, mysterious stone structure located in Asuka, Japan. This megalithic monument, also known as the “Masuda Rock Ship,” is carved from a single piece of granite and is notable for its unusual shape, which resembles a boat or ship. The stone measures approximately 11 meters in length, 8 meters in width, and 4.7 meters in height, weighing an estimated 800 tons. Despite extensive study, the exact date of its construction, purpose, and the methods used to carve the stone are still unknown. The Masuda Iwafune (“Rock Ship of Masuda”) in Asuka, Japan, is a mysterious megalith carved from a single block of granite, measuring about 11 meters long, 8 meters wide, and 4.5 meters high, with an estimated weight of over 800 tons. What makes it special is that its true purpose remains unknown even today. Unlike tombs or stone chambers from the same era, it has two square holes carved into its flat top and no clear signs of completion. Scholars speculate that it might have ...