I'm not sure about why they are ranked as they are, but SOAS offers more courses on East/South Asian studies than all the other universities in that table.
-Nottingham, from what I know, only offers chinese [mandarin] as a joint course.
-Both Oxford and Cambridge both offer single honours in Oriental Studies [I think this is comprised of Chinese or Japanese], without the possibility of combining them with any other course.
- SOAS offers most East/South Asian language and culture courses as single or combined courses. They have, by far, the largest selection of East & South Asian language courses available in the UK.
- Sheffield offers East Asian [Korean, Japanese, Chinese] single or combined courses, which can be combined but to a lesser extent than SOAS.
- Manchester offers Japanese language modules, but I'm not too sure if they even do it anymore; UCAS course search says that you can do Japanese as a combined course, but it isn't in the undergraduate prospectus anywhere.
- Birmingham offer Japanese or chinese, but I think it is only as a combined course.
- Leeds - same as Birmingham.
- Durham used to offer Japanese as a combined course but have shut down their East Asian department due to a lack of funding. It is still possible to take language modules as floaters, though, I think.
- Edinburgh also offer Japanese as a combined course, though from what I've read from graduates their Japanese department is small.
Now, in terms of the required grades needed, I think they rank as:
- Oxbridge - AAA/AAB
- Nottingham/Leeds/Birmingham - ABB
- SOAS/Sheffield - BBB [though Sheffield has increased to ABB for 2007 entry, and I'm sure SOAS will do the same]
- The rest
So really, I think they are ranked in order of the reputation of the university and the difficulty of getting in [this is just a hunch].
There are also other points to consider:
- Job prospects - the prospects of studying East Asian studies at Oxbridge is undoubtedly greater than studying at any of the other places. BUT, at the same time, it seems Sheffield and SOAS [with its high employment rate] also have good prospects in respect to working in East Asia. From people I've spoken to from that region, it seems that these two universities are thought of very well. I'm not sure about Nott, Birm or Leeds, though, as I haven't done much research into them so i can't comment on them with any degree of accuracy. But, doing something like Economics + Japanese at Birm or Leeds, which are ranked highly for economics, will certainly have excellent prospects, as will Engineering + Chinese at Nottingham.
- Course material - I can only speak for Japanese on this one. It seems that ALL of the universities above start at the same point [most use the same books and have the same material in the first year]. However, the course material seems to vary greatly between the universities after the first year; SOAS and Sheffield both have a great focus on history, Business, Economics, and Society, whereas Oxbridge place great emphasis on literature. I advise speaking to these departments and their respective universities before choosing a course, if you are really interested. Sheffield, AFAIK, is the only place offering East Asian studies as a single or combined honours, with the possibility of learning more than one language [but you'd have to check that with them].
- Year abroad - almost all of the universities mentioned include a year abroad in their East/South Asian courses. Oxbridge includes a compulsory one or two term stay [i forget], with an optional year abroad. Some combined courses will NOT have a year abroad, which can have a huge impact on your level of fluency after your course.
- What YOU want to do - granted, most people at this age don't know what they want to do, but some of us do. If you know that you want to work in East/South Asia when you are older, you may want to take the optional year abroad to make contacts, or choose a course more focused on the business aspect of things.
- the language you want to study - Japanese at SOAS may be better than Birmingham etc. Sheffield apparently has the largest centre for Korean studies in Europe. SOAS is the only place offering South Asian studies.
I would rank them as follows:
- Oxbridge
- SOAS [keep in mind, this is the only place offering South Asian courses]
- Sheffield
- Birmingham
- Leeds
- Manchester
[not sure where Edinburgh fits into this]
So, unless you are Oxbridge material, I would say that SOAS is the best place for East/South Asian studies.
Overall, I think all of the above factor into the table to some extent. Feel free to disagree with me, as this is only my personal opinion on the matter, or to correct me in areas I've gotten wrong. I only wish I had learned more about institutions offering the course when I was choosing my course, not after.