城岳貝塚Shiroyama Kaizuka

不明，1923年（大正12年）9月，当时就读于那覇商業学校的学生樺山資隆，与另外三名朋友一起到城岳貝塚自行挖掘。他们挖了一个直径约四至五尺（约1.2–1.5 m）的坑，一直挖到约二尺深（约60 cm）碰到岩石；随后在这个坑的侧壁、距地表约一尺（约30 cm）处发现了明刀。原论文还特别说，同一个挖坑地点还发现了石鏃数枚、石制玉十余枚，但到橋本増吉写文章时这些伴出物已经"皆散逸"，因此无法再进行组合研究。1923年发现。

Context unknown. In September 1923 (Taishō 12), a student named Kabayama Suketaka, then enrolled at Naha Commercial School, dug at the Shiroyama Shell Mound together with three friends. They dug a pit about 4-5 shaku in diameter (about 1.2-1.5 m), down to a depth of about 2 shaku (about 60 cm), where they hit bedrock; the Ming Knife coin was then found in the pit's side wall, about 1 shaku (about 30 cm) below the surface. The original article further notes that several stone arrowheads and over a dozen small stone jade-like objects were also found at the same dig spot, but by the time Hashimoto Masukichi wrote his article these associated finds had "all been scattered and lost," making further contextual study impossible. Discovered in 1923.