OAKLAND -- The A's unveiled their Spring Training schedule on Wednesday, releasing details on their abbreviated 21-game Cactus League tour that will be followed by a week-long visit to Japan to begin the regular season.The schedule also includes a rare visit to Raley Field in Sacramento, where the A's Triple-A affiliate will host an exhibition game March 31. Less than a month prior, on March 2, the A's Cactus League season is set to open against the Mariners at Phoenix Municipal Stadium, where the first of just 10 home games will be played. Oakland will also play host to the Cubs, Brewers, D-backs, Angels, Dodgers, Reds and Royals during the month. Though the Giants are missing from that list, the A's will meet their cross-bay rivals in a split-squad game at Scottsdale Stadium on March 17. Highlighting Oakland's spring will be a trip across the sea to Tokyo, where the A's will serve as the home team for two regular-season games against Seattle in the Tokyo Dome on March 28 and 29. The long journey marks the second time the A's have participated in Major League Baseball's Opening Series, as they engaged in a two-game set with the Red Sox in Tokyo in 2008. Oakland's contest against the River Cats, which will represent its first appearance in Sacramento since 2007, will be followed by the annual three-game Bay Bridge Series against the Giants beginning April 2. San Francisco will host Games 1 and 2, with the A's set to welcome in the Giants to the Coliseum for an evening game on April 3 -- just three days before the club's regular-season home opener against Seattle. The A's Radio Network, heard on 95.7 FM The Game, will broadcast 10 of the club's exhibition games, as well as both regular-season contests in Japan. Official travel packages and season tickets for A's Spring Training home games are now on sale at www.oaklandathletics.com/spring. Single-game tickets are also on sale at that site, or by calling 877-493-2255, and the box office at Phoenix Municipal Stadium will open Feb. 6.