This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country (日本) on the URAA date (1 January 1996).
English: Stone Coffin of Futatsuka Kofun - Shikano 2 chōme, Taihaku ward, Sendai, Miyagi prefecture, Japan today. Mogasaki, Natori district, Miyagi prefecture at the time of the excavation. Scanned from fig.4 of the Sendai City History (Sendai Shishi) vol.3 published in 1950. According to the page 57 of the book this was taken in 1905 or 1906 when the coffin was discovered. The names of the photographer and boys are unknown.