LONE ALLYFor the past seven decades, Japan, which gave up the right to wage war after its defeat in World War Two, has relied on the United States for protection.
Japan hosts 54,000 American troops, hundreds of military aircraft, and dozens of warships led by Washington's only forward-deployed aircraft carrier.
Encouraged by the United States, Japan in December unveiled its biggest military build up since World War Two, with a commitment to double defence spending to 2% of GDP within five years.
NEW ALLIESFor that reason, and again with Washington's support, Japan is seeking new security partners to back it up both militarily and diplomatically.
As Britain tilts more towards Asia, it has sought closer defence ties.