While Japan's defense in its Rugby World Cup opener against Chile on Sunday was not nearly as tight as the security in and around Stadium de Toulouse, the six tries the Brave Blossoms scored, not to mention their familiarity of playing in stifling heat, ensured it did not have to be.

Japan made it eight wins from its last nine World Cup pool games as the Chileans wilted in the afternoon sun.

But questions remain as to why Japan could not create even more opportunities against a team ranked 22nd in the world, lowest of the 20 teams competing in France.