Gregor Townsend admits he was left “really surprised” by the late scrum penalty handed to Japan against Samoa which means the World Cup hosts could still progress from Pool A even if they lose Sunday’s crucial showdown with Scotland.

Japan secured a bonus point in Saturday’s 38-19 win when they scored a stoppage-time try after Samoa were pulled up for a rarely-questioned crooked put-in by South African referee Jaco Peyper – a decision which left Townsend perplexed.

Japan’s extras mean Scotland could take maximum points from their final two Pool A clashes against Russia – who they face on Wednesday – and the Brave Blossoms and still crash out if the hosts were to secure two losing bonus points of their own.

“We have a job to do, that much is clear. Russia have gained in confidence, they look a fit team.

“They have a very good scrum and an excellent kicking game.

“They will put everything into this.

“It’s important we build on the momentum we built against Samoa.”