The closest station is Choja machi Station (長者町駅) on the Soto-bo (外房線) train line from Chiba or Tokyo stations. Please arrange train station pickups at Choja Station ahead of time and call from the phone booth at the station when you arrive. Brown’s Field is a 50 minute stroll from the station.
From Tokyo or Narita airport take the Chiba-Togane toll road and exit at Togane. Then take the Kyuju-kyu Ri toll road and exit at Ichinomiya exit. After which, take route 128 until you get to Choja town. Please follow the map to the left from there, or better yet, use your cars navigation system.
The drive from Tokyo or Narita is generally one hour and fifteen to thirty minutes.