Manufactured by Mizuno, this game used base was actually used at Yomiuri Giants games played at the Tokyo Dome in 2015. It is one of seven game used bases that were sold in December 2018 at the Giants Online Shop. Unfortunately, we do not know whether this item was used as a first base, second base, or third base, but it is definitely game used. We know of no other game used bases that the Giants have ever sold.
Originally, the base did not have the interlocking YG logo which now occupies a prominent place on the surface. The logo was added by the Giants before offering the base for sale in 2018. Two small gold plates were also added to the sides of the base by the Giants. One simply states "Giants". The other has Japanese text explaining that this is an actual base used at the Tokyo Dome.
The underside of the base contains the holes for mounting the base, and the notations "Pro", "A" and "H27 7.17". We are fairly certain that the last notation stands for Heisei 27 (2015) July 17th, which may be the date on which the base was either produced, or received at the Tokyo Dome.
This item is certainly a rare and unusual piece of baseball memorabilia. It was also most likely used by nearly every player in Japan Pro Baseball during the 2015 season.
Size: 15" x 15" x 4"
Condition: Significant game use. There is a gash along one side.