https://www.persecution.org/2024/08/21/professor-reflects-on-tragic-history-of-christian-persecution-in-japan/
"In 1868, 3,394 Christians were taken from Nagasaki and exiled to Tsuwano in Shimane Prefecture. Many of these exiled Christians were confined and imprisoned in a sanjakaro (a 10-foot by 10-foot box), where they were often starved to death. .."
