The First Troops of the Imperial Japanese Army under the command of General Tamemoto KUROKI landed on the Korean Peninsula and defeated the Russian army on the shores of the Oryokko River near Anton (present Tanton) in an engagement that lasted between April 30th and May 1st (Battle of the Oryokko River).
黒木為楨大将率いる日本陸軍の第1軍(日本軍)は朝鮮半島に上陸し、4月30日-5月1日、安東（現・丹東）近郊の鴨緑江岸でロシア軍を破った（鴨緑江会戦）。