Just happened to be looking at some of the official team websites and noticed that a few teams have English pages, unfortunately Chunichi is not one of them. You can find links to all of the team websites from this page.
The three teams below have English pages:
Yakult Swallows - Just some basic information here
Orix Buffaloes - Orix's site actually has it's own automatic translator which converts the text on most pages to English
Softbank Hawks - Quite a bit here, including info about the online goods shop which will even ship to the U.S.