After looking at the Keele website I've found that you can study at both Keele and another university in another country.
Keele sends out around 120 students to other universities every year. You go in your second year for a semester or two.
Or - from what I can gather - for a year if you want to do a placement.
Then you come back to Keele.
There's three partner universities they have in Japan, one of which is around 50 minutes to 1 hour away from Akihabara.
You might want to ask and apply as early as you can.
It doesn't seem to matter what you're studying for the most part (obviously check first) and you'll need to have decent grades too when you're at Keele, from the website it says 55% minimum overall to study abroad and 60% average if you're studying physics, astrophysics, or law at Keele. You'll be studying the same sort of modules at the other university. You'll be able to go to somewhere in America, Europa, Asia, South Africa, Australia if you want to.
Just Google for "Keele aboard" and read through the stuff on the Keele website. Also ask people who have already done it like third year students and see what they really thought of the experience and the university that they went to.
Some people from Keele have done short vlogs on YouTube about doing this and studying in another country so just search for "Keele abroad" on YouTube or something like that and look through some videos.