Japanese intensive courses

[cwg101]

My apologies if this thread repeats another thread (please just point to that other thread if there is one) but with a couple of thousand to troll through it was a bit daunting.

I am looking for a good Japanese school near Kawasaki (ideally) or Tokyo which provides intensive Japanese classes (e.g. one week - 6 weeks in duration). At this stage I am at a medium beginner level - roughly starting N4 on the JLPT. I live in New Zealand and would come to Japan for the course.

I would like to focus on speaking and listening (and reading) and am not too fussed on writing. Price isn't too much of an issue but quality and intensity is - so I can get good 'bang for my buck'.

I am looking for a structured class rather than just private lessons and would prefer not to have English used at all.

Thanks for taking the time to read and help.

Regards
Chris