British aircraft carrier HMS Queen Elizabeth is due to make a port of call at a US Naval base in Yokosuka, south of Tokyo, on Saturday.
The state-of-the-art vessel left Britain in May. It has since been enhancing coordination with other countries in the Indo-Pacific region.
Last month, it took part in a joint exercise with Japan's Self-Defense Forces and US forces in waters south of Okinawa.
The carrier will also hold a joint drill with the SDF in the air and at seas for several weeks. It's seen as an attempt to keep China in check, in light of the country's increased maritime activities.
Britain regards Japan as its closest security partner in Asia. It says the carrier's visit is intended to increase cooperation to new levels.
Britain expressed its commitment to the Indo-Pacific region in diplomatic and security policies released in March.