Boris Johnson is set to agree a "landmark" defence agreement with the Japanese prime minister in London which will allow for the two armed forces to work together.
Fumio Kishida's first official visit is to be marked with a guard of honour and an RAF flypast over central London today.
Downing Street said the leaders are expected to agree in principle a "landmark" reciprocal access agreement (RAA), paving the way for Japanese and British forces to work together on training, joint exercises and disaster relief activities.
