Masuda-no-iwafune – Gigantic boulder with perfect carvings – Age unknown
Links:
https://archivapp.sagenhaftezeiten.com/de/profiles/ae8c0f8191ae/editions/7a8bbc50205e0b386e47/pages/page/6
https://www.youtube.com/watch?v=yDXkJEhp1fc
https://www.youtube.com/watch?v=fasieBeP4-4&t=6s