Along with these jobs, there will be a lot of support activities which will be affected, legal, accounting, audit and of course the tax they pay.
But this trickle is going to a stream soon.
"Japan is a major investor in the UK, where more than 800 Japanese companies employ more than 100,000 people.
However, financial firms including Nomura, Sumitomo Mitsui, and Daiwa have already said they will no longer maintain their EU headquarters in London."
Most worrying of all are the British companies who may go, Vodaphone included.
www.bbc.com/news/business-45351288
I wonder if some Brexiteer will celebrate this as it will mean fewer foreigners?