Fleet-footed winger Shane Williams heads into his 50th Test today with a golden opportunity to overtake the legendary Ieuan Evans in Wales' all-time try-scoring list.

Evans scored 33 tries for Wales in a 79-Test career. Williams is now just one try behind and he boasts a remarkably superior strike-rate.

It is often difficult for players to quantify their own achievements when their focus is trained on the next match, the next battle, the next try, the next tackle.

The time for reflection, they usually say, comes with retirement.

But Williams knows what it would mean to score twice against Japan and move above Evans into second place in the Welsh try charts, behind only Gareth Thomas.

And he will lead the Wales side out at the Millennium Stadium in expectant mood after notching seven tries in three previous encounters with Japan.

''It would be great if I could do it. I grew up watching Ieuan and I remember all his tries. He just seemed to score for fun so to be up there with him is a privilege,'' said Williams.

''The likes of Ieuan and Gerald Davies were players I aspired to so when people are talking about you scoring more tries than Ieuan Evans it is great."

Williams has demanded Wales put Japan to the sword and prove wrong the critics who have written off their chances of making a positive impact on the World Cup.

''This is a game where we need to prove the doubters wrong, we need to play as we have been in the second half of matches right from the start,'' he said.

''We know we are a better side than we're showing in the first half of matches.

''But if we play the way we played in the second half against Australia I don't think Japan will be able to compete with us.''