Japanese companies likely to spurn Saudi Aramco IPO - JXTG president

, TOKYO (Reuters) - Japanese companies are unlikely to invest in Saudi Aramco's blockbuster initial public offering (IPO) because it is difficult to evaluate the value of the world's biggest oil company, the head of Japan's largest refiner said on Friday.The unusually frank remarks from the head of a typically conservative Japanese company underscore potential challenges for the IPO, which Aramco has announced is going ahead although the state-owned oil giant has released few details.Sources..