The Pacific League will not hold any night games during April in quake-affected parts of Japan, the six team owners decided at an emergency meeting Monday.
The PL, which has postponed the opening of its season to April 12 from March 25, also decided to limit games to 3 1/2 hours as eastern Japan battles a nuclear power crisis that has sapped the region's electricity.
The education ministry, which governs sports in Japan, urged Nippon Professional Baseball on Friday to refrain from playing games at night in areas running on limited power.
"Our priority rests with the feelings of the victims, and we are going to exercise common sense in this country's biggest crisis since the World War," Tohoku Rakuten Golden Eagles owner Toru Shimada said. "We will try to conserve electricity when and wherever we can."