It seems MLB International will be holding Pitch, Hit, and Run competitions at four different locations in Japan between April and June. The contest will be geared towards boys and girls between the ages 7 and 14 and will test them on their pitching, hitting, and running skills.
The schedule is as follows:
4/24 in Tokyo at Ota Stadium
5/15 in Fukuoka at Gannosu
5/22 in Aichi at Aichi Commemorative Park
6/5 in Sapporo at Sapporo Dome
It seems there's a Japanese version of the Pitch, Hit, and Run site, but I can't seem to access it right now. The link is: http://mlb-phr.jp/.