Indian men's hockey team thrashed Japan 6-0 in its opening match of the double-leg Four Nations Invitational Tournament in New Zealand today. Rupinder, Vivek, Dilpreet Singh and Harmanpreet Singh scored in India's win.The team got off to a dominant start, controlling the ball rather swiftly, passing around neatly and quickly to penetrate the Japanese circle. India will take on Belgium in their second match tomorrow.