Take the following as truth: In 1543 Portuguese explorers reached Tanegashima Island, off southern Kyushu, followed over the next decade by Portuguese traders and Jesuit missionaries, headed by St Francis Xavier, who landed at Kagoshima in 1549.
Then the following statement: "In 1543 Portuguese explorers landed at Tanegashima and then proceeded to mainland Japan." is true, false, or inconclusive?
Answer: Inconclusive