TOKYO — Japan was involved in a war of words with China this week after Prime Minister Sanae Takaichi said a Chinese attack on Taiwan could constitute “a survival-threatening situation” for Japan requiring the use of force. Takaichi, who was elected as the country’s first female prime minister last month, said Friday that Chinese use of force around Taiwan would qualify as “an existential threat.” Her comment drew sharp criticisms from Beijing over the weekend. “We have no choice but cut off