Sunwolves will never be successful until they sort out whatever politics is going on behind the scenes.
Last year they changed their line up every year and I thought it might be the coaches, this year we see a change of coaches and nothing has changed. Sometimes Tamura starts, sometimes it's Parker, sometimes it's Nakamura, and I'm pretty sure they've played Emery and Tatekawa at 10 as well. Thats ONE position, and they can't get any consistency, same goes for the rest of there backs, sometimes it's Nagare (the captain supposedly) sometimes it's Tanaka sometimes it's Uchida (just at 9). The rest of their backs, with the sole exception of Little since he's started playing, shuffle on a weekly basis.
I play fantasy quite seriously and therefore study line ups every week and something is screwy. No team can achieve consistency if they change their line up every single week, I don't know if it has to do with their domestic league policy or it has something to do with with national side but no team can achieve success under these conditions I'm sorry.
I'm not sure if Jamie Joseph knew what he was getting into but it's no way to run a team. They will win the odd game because they are essentially a barbarian side.