He was interned during the Japanese occupation of Hong Kong December 1941 -- September 1945 .
Johnston left New Zealand to serve as a missionary in China , arrving there on 13 March 1941 .
Johnston was interned during the Japanese occupation of Hong Kong December 1941 -- September 1945 .
Johnston left New Zealand to serve as a missionary in China , arrving there on 13 March 1941 .