was floating downstream so I ran down and jumped in and my friend went upstream to rescue the other boy where he was struggling," Bartz said.

Naoki Kubo of Kyoto, who was nearby, also jumped in the river to help Baba rescue Nanbu, police said.

When Bartz, a native of Wales, reached Kohara he said the boy had no pulse.

After he pulled the unconscious boy from the water, two passersby began administering cardiopulmonary resuscitation.

Baba and Kubo, meanwhile, swam out into deep water to reach the other boy and pull him to safety.

Kohara was resuscitated and the two boys were taken to the hospital. Nanbu was sent home, but Kohara was kept for observation.