Heisman Trophy winner Bo Jackson scored three touchdowns, including a victory-clinching 57-yard run, as the East defeated the West, 31-14, yesterday in the Japan Bowl college football all-star game in Yokohama.

Jackson, of Auburn, also scored on a 69-yard pass play from Illinois' Jack Trudeau and on a one-yard plunge, and LSU's Jeff Wickersham passed to Illinois' David Williams for a 58-yard touchdown for the East.

Jackson was named most valuable player of the game, played before about 30,000 spectators at Yokohama Stadium. He rushed for 171 yards, doubling the Japan Bowl record, on 18 carries.

Lineman Mike Hammerstein of Michigan was named the game's outstanding defensive player . . .

Rejected by the defending national champion for the first time in its four-year history, the Kickoff Classic in the New Jersey Meadowlands is reported leaning toward an Alabama-Ohio State game to open the 1986 college football season.

Oklahoma declined because of a rugged schedule starting with UCLA, Minnesota and Miami (Fla.). Alabama was No. 13 and Ohio State No. 14 in the final 1985 Associated Press poll.

The pairing, according to the AP, is expected to be anounced this month. The probable game date is Aug. 28.