Canadian representatives returned to Tokyo in 1946 in the wake of Japan's unconditional surrender to allied forces after the Atomic bombings of Hiroshima and Nagasaki.
Japan also opened a diplomatic office in Ottawa in 1951 for the preparation of the future resumption of diplomatic relations.
 Full restoration of Japanese-Canadian relations accompanied the San Francisco Peace Treaty in 1952.

The Canadian Legation in Tokyo was upgraded to an embassy and Robert Mayhew was appointed as the first Canadian Ambassador to Japan after World War II.
Japan also established an embassy in Ottawa and Sadao Iguchi became the first Japanese Ambassador to Canada.

Canada acted in various ways to assist Japan's re-entry into the international community.
It was at Canada's initiative that Japan was admitted membership to the Colombo Plan conference that convened in Ottawa in 1954, the same year the bilateral Agreement Concerning Commerce was sealed.
 Canada supported Japan's inclusion in General Agreement on Tariffs and Trade (GATT); and when Japan entered GATT, Canada was one of only a small handful of nations who accorded it most-favored-nation status.

Japan was nominated by, and had the backing of Canada when it joined the United Nations in 1956.
Similarly, Canada demonstrated strong support for Japan's admission to the Organisation for Economic Co-operation and Development (OECD) in 1963.
Canadian representatives returned to Tokyo in 1946 in the wake of Japan's unconditional surrender to allied forces after the Atomic bombings of Hiroshima and Nagasaki. Japan also opened a diplomatic office in Ottawa in 1951 for the preparation of the future resumption of diplomatic relations.  Full restoration of Japanese-Canadian relations accompanied the San Francisco Peace Treaty in 1952.
The Canadian Legation in Tokyo was upgraded to an embassy and Robert Mayhew was appointed as the first Canadian Ambassador to Japan after World War II. Japan also established an embassy in Ottawa and Sadao Iguchi became the first Japanese Ambassador to Canada.
Canada acted in various ways to assist Japan's re-entry into the international community. It was at Canada's initiative that Japan was admitted membership to the Colombo Plan conference that convened in Ottawa in 1954, the same year the bilateral Agreement Concerning Commerce was sealed.  Canada supported Japan's inclusion in General Agreement on Tariffs and Trade (GATT); and when Japan entered GATT, Canada was one of only a small handful of nations who accorded it most-favored-nation status.
Japan was nominated by, and had the backing of Canada when it joined the United Nations in 1956. Similarly, Canada demonstrated strong support for Japan's admission to the Organisation for Economic Co-operation and Development (OECD) in 1963.
Canada–Japan relations