I know that the Hanshin Tigers were the hard luck team for a while. Their fans have very odd customs, such as jumping into a body of water when the team does well. They had the "Colonel Sanders curse" when a statue of the Colonel was tossed into the Dotenbori canal during the last time they made it to the playoffs. Then they were cursed for many years. They just dug him out earlier this year, so there was high hopes for this season.
The Yomuri Giants...yeah like the Yankees sorta. There's the Dragons that look like the Dodgers. I'll pull for the jints in that case...