[1] Keiichi Hayashi was born on 8 February 1951 in Yamaguchi Prefecture.

[2] In 1973, Hayashi stayed in Folkestone, in the UK, for three months to attend an English language school.

[1] In 1974, Hayashi joined the Ministry of Foreign Affairs.

[1] On 11 January 2011, he was appointed Japanese ambassador to the United Kingdom.

[1] Hayashi attended the wedding of Prince William and Catherine Middleton at Westminster Abbey in London on 29 April 2011, officially representing Japan in place of the Emperor and Empress of Japan, who had to decline following the Great East Japan earthquake of 11 March 2011.