For UK viewers, there is now an economical and easy way to watch Kurosawa films. BFI Player+ has over twenty of his films to stream, including most of his best-known classics, and it costs only £4.99 per month!
This guide is quite good on E-mount lenses: http://thewirecutter.com/reviews/first-sony-e-mount-lenses-to-buy/
You mentioned you're looking at the Sony 35mm f1.8 - I definitely recommend this prime. It offers good image quality and is quite affordably priced.
As for zooms, I haven't used the 18-105 (the link talks about some of its strengths and weaknesses), but I am personally looking at buying the 16-70mm f4 Sony/Zeiss lens (not the same as Zeiss proper--so it's cheaper). It's had a mixed reception (might be a quality control issue) but I've seen some nice video work done with it.
If you are trying to decide between getting a zoom or prime to start with, it really depends on what you want to shoot at the moment. The 35mm prime is pretty versatile (on the crop sensor its field of view is similar to 50mm). Are you planning to buy the camera with the 16-50 kit zoom? If you can get a good deal on the bundle, then you could just go for the prime for now. I mean, this was shot with the kit lens: https://vimeo.com/163103896.
There is of the course the option of getting an adapter to Canon EF or Nikon lenses, which opens you up to a huge range of frankly better value-for-money glass.