The following information was released:
Construction on the museum began during the 2007 off-season when Koshien Stadium began its renovations.
It cost about 500M yen to create the new museum.
The entrance to the new museum will be near gate 16 on the left field side.
The museum will span two floors (the wide from left field to right field) for a total of 1,200 square meters of space.
There will be about 2,000 artifacts on display from the various events that have taken place at Koshien stadium over its 86-year history, like high school baseball, Tigers baseball, and the Koshien Bowl.
Admission will be 500 yen for adults (or 400 yen for groups of 20 or more) and for 399 yen for children 4 years and older will (or 300 yen for groups of 20 or more).
There will also be a stadium tour package (the tour will take visitors to areas like the dugout on the third base side, the bullpen, and the locker rooms) that will includes admittance to the museum. The package will cost 1,500 yen for adults (1,200 yen for groups) and 1000 yen for children (800 yen for groups). Tours will begin on 4/6 and will max out at 30 people per group. Reservations will be available beginning 3/3 via the Koshien Stadium website.
The museum will be open from 10am to 6pm and will be closed on Mondays (excluding opening day and holidays).
They are expecting about 1,000,000 visitors are year.