Your JR Pass is a sports travel pass
The Japan Rail Pass is one of the best deals for tourists, and it's also the perfect tool for a sports-hopping trip across Japan. Most major stadiums are accessible by JR lines, including the shinkansen.
Stadiums reachable by shinkansen
From Tokyo Station: Sendai (Rakuten Park, 90 min), Nagoya (Vantelin Dome, 100 min), Osaka (Kyocera Dome, 2.5 hrs), Hiroshima (EDION Peace Wing, 4 hrs), Fukuoka (PayPay Dome, 5 hrs). All covered by the JR Pass.
Sample 7-day sports itinerary
Day 1-2: Tokyo
Tokyo Dome or Jingu Stadium.
Day 3: Sendai
Day trip for Rakuten Eagles + gyutan lunch.
Day 4-5: Osaka/Kobe
Kyocera Dome or Panasonic Stadium. Kobe beef dinner.
Day 6: Hiroshima
EDION Peace Wing + Peace Park + okonomiyaki.
Day 7: Return to Tokyo
Stop in Nagoya for a Dragons game on the way back.