When Korea demanded that Japan should hand over war criminals of Japan's Invasions of Korea, the Tsushima Domain handed over criminals in the domain (who had nothing to do with the invasions) as war criminals, after harming their throats with mercury so that they were unable to talk.
朝鮮側から朝鮮出兵の際の戦犯を差し出すように要求されたため、対馬藩は藩内の（朝鮮出兵とは全く無関係の）罪人の喉を水銀で潰して声を発せられなくした上で「朝鮮出兵の戦犯」として差し出した。