UPDATE: Be sure to check the first comment below for more on the pitcher's use rule. It appears as though the 30-49 pitch rule will be in effect on both Saturday and Sunday. Thanks Mike!
Daisuke Matsuzaka has the start against the US and it now seems as though Hisashi Iwakuma will be the starter for the Finals game, should Japan advance.
Where does that leave Yu Darvish?
In the bullpen for both the Semifinals and Finals games.
When Darvish was approached to comment on his potential appearances...
"My appearances moving forward? I've been talking to the pitching coach (Hisashi Yamada) about that. What have the talks have been about? I can't really say. What do you think they'd be about? From here on out, it's one loss and out and I'll do whatever it takes to ensure that we're still standing at the end."
So it looks like Samurai Japan thinks Darvish can best serve his team out of the pen. This means Darvish could potentially pitching in both games, provided he throws less than 30 pitches.
...And this is actually where not having a day off between the Semifinals and Finals game could actually hurt Japan. If Japan had the day off between the two games, Darvish would have another 20 pitches.
It'll be interesting to see how all this works out for Japan.