Japanese stocks fell in early trading as investors assessed risks from the Iran war and rising energy costs after the U.S. and Iran exchanged fire Tuesday. Chip-related shares led the decline, with SoftBank Group down 4.1%, Advantest off 4.0% and Tokyo Electron down 4.5%. The Nikkei Stock Average fell 2.2% to 64742.17. The dollar traded at 160.19 yen, compared with 159.94 yen at Tuesday's Tokyo stock-market close, as investors monitored crude oil prices and developments in the Middle East.