My clutch, april 2017 Mk3, started juddering after 1500miles and went on for many thousand of miles. I talked with the dealer about this problem and the answer was "Yes, we know, many Jazz's clutches judders but we tried to solve it changing the cluthc pack with no results, so now we can only hope to get some tips from Honda or a new clutck assembly"
Anyway, now I've just reached 18000miles, and judderings pratically have ended.