Japan serve up warning to Wales in advance of South Africa challenge

• Wales 33-30 Japan• Rob Howley will make important changes when Wales face SpringboksConsidering the way both sides are playing, a scoreless draw does not seem altogether inconceivable when Wales host South Africa on Saturday. But assuming the trench warfare eventually relents, Rob Howley’s team will find themselves with a scarcely deserved opportunity to stumble into the record books.No Welsh side has ever managed three wins from their autumn internationals in Cardiff and after Sam Davies’s last-gasp drop goal spared their blushes against Japan, the defence coach, Shaun Edwards, was quick to…