The Mariners were teeing off in batting practice Saturday in their first workout in the dome, where the ball carries well and the fences aren't particularly deep.
Mike Carp and Justin Smoak both banged several shots off the concrete wall above the last row of seats in right field. Jesus Montero hit a camera parked out in center field.
The longest shot of the day went to big Carlos Peguero, who launched a moon shot off Blake Beavan in a brief simulated game after batting practice. Peguero's blast smacked the middle of the face of Japanese baseball legend Shigeo Nagashima on a billboard high above the right-field stands.
"I wasn't expecting that in BP," Carp said after putting on a show in his final few rounds. "I just felt good and loose today. It's awful nice here. It's going to be fun. These could be an interesting four games for us. It was good to shake off that jet lag and let it fly a little bit today."
The Tokyo Dome has a roof similar to the old Metrodome in Minnesota and a look similar to Tropicana Field in Tampa. For current Mariners players who never enjoyed the hitting comfort of the Kingdome, it was a nice boost of confidence.
"This is a good place to hit and I think guys were pretty excited to be here and everything, so guys were swinging a little harder just to see what they could do," said third baseman Kyle Seager, who knocked a few shots of his own off the metal outfield seats. "You don't want to get away from your approach, but it was definitely fun. It's a change of scenery and you always want to see what you can do in a new place."