Asian stock markets were mostly lower on Tuesday, AP reported. Japan's Nikkei 225 fell 0.6 percent to 18,866.99 as the yen gained against the U.S. dollar. South Korea's Kospi slipped 0.1 percent to 2,164.38. Australia's S&P/ASX 200 fell 0.2 percent to 5,860.30. Southeast Asian shares were mixed. Markets in Hong Kong and Shanghai were closed for public holidays. Benchmark U.S. crude added 1 cent to $50.25 per barrel in New York. The contract lost 36 cents to close at $50.24 a barrel on Monday. Brent crude, used to price international oils, gained 2 cents to $53.14 a barrel in London. The dollar slipped to 110.57 yen from 110.92 yen while the euro was steady at $1.0671.