(Adds comment from Ishin leader, updates stock index rise) * Ishin's support ends risk of LDP losing power * Ishin leaders to meet LDP leader Takaichi at 0900 GMT * Yen falls, Nikkei index rises almost 3% to record high TOKYO, Oct 20 (Reuters) – Hardline conservative Sanae Takaichi is almost certain to become Japan's first female prime minister on Tuesday, after the right-wing opposition Japan Innovation Party, known as Ishin, said it was ready to back her premiership. "I told Takaichi that we should move forward together," Ishin's leader and Osaka governor Hirofumi Yoshimura told reporters in the western Japanese city on Monday. He will meet with Takaichi at 6 p.m. (0900 GMT) to conclude the alliance, he added. Yoshimura and Ishin's other boss, Fumitake Fujita, joined party lawmakers earl

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