After some searching, and some choice words, I found the rosters for all teams for the tournament from Yahoo! Japan Sports. I only have batting stats from the prefectural tournament, and all I did my best to determine names.
These are separated by region, and I will eventually have English names of the teams on the site. Meanwhile, please use this in coordination with the other spreadsheet to determine teams.
Hokkaido & Tohoku
Kyushu & Okinawa