Very unlikely to find Japanese WGs in London let alone the North East. Japanese women in the UK don't need the money - there's roughly 3 categories of Japanese women over here- the students, who have wealthy or relatively wealthy parents, the single women will be working here for the UK branch of a Japanese company and the rest will be married to British blokes. Any WG in the UK saying she is Japanese I would be sceptical. Not impossible, but unlikely.