The best place to watch the fireworks is from the Decks building. From Tokyo Teleport Station exit A, walk straight keeping Diver City in front of you. Turn right and head into the foot bridge that crosses the train tracks. Continue straight on the bridge and down to street level. From the foot bridge exit, walk straight crossing one main road, and you will see the Decks building in front of you on the right hand side.From Shinjuku Station to Tokyo Teleport Station:
Take the Yamanote Line to Osaki Station, change trains to the Rinkai Line for Tokyo Teleport Station (25 minutes, ¥500)
From Tokyo Station to Tokyo Teleport Station:
Take the Yamanote Line to Osaki Station, change trains to the Rinkai Line for Tokyo Teleport Station (20 minutes, ¥500)