Located within the premises of the Tokyo Dome, the Baseball Hall of Fame and Museum is for baseball lovers, especially those with an interest in Japanese baseball. 
The museum is divided into sections, all dealing specifically with baseball in Japan:1) Highlights and New Acquisitions
2) Professional Baseball
3) History of Baseball
4) Amateur Baseball
5) Baseball Hall of Fame
6) Special Exhibitions
7) Event Hall - Hands on Baseball Experience
8) Library
Very few of the exhibits are labeled in English, but I was given an extremely thorough pamphlet on my way in.
I don't have much to say about this museum because I do not have any interest in Japanese baseball. It was well put together, exhibits were easy to see,... but I really only recommend this museum to those who like Japanese baseball, otherwise most of the memorabilia has little significance.
Admission: Age 6-15: 200 yen; Adults: 500 yen; Age 65 and up: 300 yen
Hours of Operation:
March - September: 10am - 6pm
October - February: 10am - 5pm
Closed most Mondays and during the New Year's holidays.
Address: 1-3-61 Koraku, Bunkyo-ku 112-0004
*The entrance is located to the right of Gate 21 of the Tokyo Dome.
Phone: 03-3811-3600
They do have an excellent English website: http://english.baseball-museum.or.jp/index.html
