In Japan's Asuka region sits a mysterious monolith with two 1m square holes over 1m wide and up to 1.8m deep. The Rock Ship of Masuda has puzzled researchers for decades — its purpose, creators, and age remain unknown. Some date it 2,500+ years, but scholars can't verify this.
Rock Ship of Masuda: 800-tonne megalith carved with mysterious square holes
Site mentioned
📍 Rock Ship of Masuda
Key facts
- Located near the top of a hill in Asuka, Nara Prefecture, Japan
- Basalt monolith weighing approximately 800 tonnes
- Dimensions: 11 meters by 8 meters by 4.7 meters
- Top is flattened with two 1-meter square holes (1.3m and 1.8m deep)
- Has a ridge line parallel to both holes
- One hole fills with rainwater due to cracks in the rock
- Latattis-shaped indentations at the base relate to the builders' flattening process
- Visible cracks suggest the stone may never have been finished
- Purpose remains unknown - theories include religious function, commemoration of Masuda Lake, astronomical observation, or royal tomb
- No human remains ever discovered around it
- Some sources date it to over 2,500 years ago but this date is unverified
- Archaeologists cannot confirm who made it, when it was carved, or why
Sources
https://www.lingexp.uni-tuebingen.de/z2/Morphology...lingexp.uni-tuebingen.de
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wikipedia_word_frequencies.txt - TU Darmstadtpublic.ukp.informatik.tu-darmstadt.de
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