With both teams out of playoff contention, the last-placed Japanese side scored eight tries to three and ran the woeful visitors ragged on their way to a commanding 48-21 victory on a scorching afternoon in Tokyo on Saturday.
The Sunwolves, who had just one other win this year and came into the match having conceded 146 points in two big losses in South Africa, trailed by 14 towards the end of the first half before rattling off 41 unanswered points and keeping the visitors scoreless in the second spell.