The Bamboo Sprout, or Bamboo Shoot, is a recurring item in the 1940 series. It's use vary from each game.
This item first appeared in 1943: The Battle of Midway. It is a rare item which appears by hitting certain spots in the stages and grants a 2000 points bonus. In the NES version of the game, finding this item will grant the player with an extra point to distribute to one of the ship's stats.