By Elaine Lies TOKYO (Reuters) – Russia’s ambassador to Japan paid his respects at a memorial in Hiroshima on Thursday saying he wanted to highlight Russia’s efforts to reduce nuclear arms and criticising a decision not to invite him to a commemoration on Saturday, media reported. Hiroshima became the first city to suffer an atomic bombing on Aug. 6, 1945, and it holds a remembrance ceremony every year on the anniversary of the U.S. attack that killed more than 140,000 people by the end of that year, regularly inviting ambassadors from some 100 countries to take part. But this year, Russia was…