Japanese Prime Minister Shinzo Abe has issued a much-anticipated statement marking the 70th anniversary of the end of World War Two. He gave a "heartfelt apology", but as the BBC's Mariko Oi explains, that is only one of the many ways you can express remorse in Japanese. In English, you either say "sorry" or "apologies". In Japanese, there are at least 20 different ways. One of the most casual and