This video shows bunkai for the opening sequence of Sochin kata. In addition to discussing the bunkai, the video also touches upon some key bunkai principles found in the sequence:
1 – On strikes in kata, the non-striking hand is either clearing obstructions or telling you where the enemy is via proprioception.
2 – The angle in the kata represents the angle you assume in relation to the enemy (not the angle the enemy is attacking you from).
3 – The hikite (hand on hip) is never idle but is either pulling or monitoring.