May 14 – The Japan–British Exhibition opens at White City, London, the largest international exposition the Empire of Japan had participated in up to that time.
May 20 – Kōtoku Incident: police searching the room of Miyashita Takichi, discover a socialist-anarchist plot to assassinate the Japanese Emperor Meiji, leading to mass arrests.[2]
^Nish, Ian Hill; Cortazzi, Hugh (2002). Britain & Japan: Biographical Portraits. Japan Society Publications. p. 338.
^Shirase Antarctic Expedition Supporters' Association (2011). The Japanese South Polar expedition, 1910-12 : a record of Antarctica. Norwich: Bluntisham Books. ISBN9781852971090.