Japan's longest-serving prime minister, Shinzo Abe, has announced his resignation, citing ill-health. His departure marks the end of an unusual era of stability in which the Japanese leader struck up strong ties with the US president, Donald Trump, even as Abe's ultra-nationalism riled the Koreas and China. Although he pulled Japan out of recession, the economy has been battered anew by the coronavirus pandemic

• Japan PM Shinzo Abe quits over health concerns