GBP/JPY has fallen sharply yet again ahead of the Tokyo open, currently trading sub 151.00, in what represents the lowest level seen since September 2013, as fears of a potential exit of the United Kingdom as a member of the European Union mount, following the most recent opinion polls.Opinion polls getting scarily biased towards BrexitAs a reminder to readers, last Friday, with liquidity very poor post London close, an ORB poll for the Independent showed that 55% favor a leave vs 45% to remain, with the poll excluding those voters undecided. The news hammered the Sterling from 153.50/60 down towards 151.50 support, prior to extending the losses today.Opinium poll reinforces fearsToday's trigger on further GBP selling is being atributed to a new Poll from Opinium, in which a huge lead for Brexit was revealed. As reported earlier, while the poll was commissioned by the Brexit backing Bruges Group think tank, "is further evidence that the Leave camp is gaining support and delivers the biggest margin of victory for Brexit so far", the Express UK wrote. According to Express UK: "The poll found 52 per cent chose to leave the EU, with only 33 per cent choosing to keep the status quo. Despite there being less than two weeks before the crucial referendum, on June 23, a further 15 per cent said they still didn't know."