I would offer to help, but I'm doing LA work for HT right now :/ Maybe sometime in the future when things get settled over there (and once I understand this game better!) I could help with translations.
Having BB cell-phone oriented would be a huge thing for the Japan market.
The other thing that might help BB in general is that it's kind of hard to keep track of what's happening in the team. Having a 'news feed' for recent events over the last 7 days or even last 3 days would help. 'Teamxxx outbid you for Dude Player', 'the team received $$$ from playing a home match', 'Dude Player is now on the transfer list', things like that would really help new managers understand what is happening around them.