Go in and win!
Shikkari ganbatte koi.
tightly (holding on); firmly; securely; strongly (built); solidly; sturdily; steadily; properly; well; sufficiently; hard (working, etc.); fully; completely; reliably; dependably; levelheadedly; shrewdly; wisely; cleverly
to persevere; to persist; to keep at it; to hang on; to hold out; to do one's best; to insist that; to stick to (one's opinion); to remain in a place; to stick to one's post; to refuse to budge
to gouge; to hollow out; to bore; to excavate; to scoop out; to greatly perturb; to cause emotional pain; to get to the bottom of things; to relentlessly bring the truth to light