Ishikawa trails Scott by 1 in Akron

In March, Ryo Ishikawa pledged to donate all his earnings on the golf course in 2011 to tsunami-relief efforts in his native Japan.

Ishikawa, 19, already has donated about $740,000 and could add $1.4 million to that total if he can overcome a one-stroke deficit to Adam Scott in the final round Sunday of the Bridgestone Invitational in Akron, Ohio.

Never better than 20th in a stroke-play tournament in the United States, Ishikawa — who will look to become the youngest winner of a PGA Tour event in 100 years — made six birdies en route to a 6-under-par 64 that put him in the final group with Scott.

Scott made four birdies on the back nine on his way to a 4-under 66 …