First post so here we go!
I think that I could have a good contender here. While I in no way claim to have the highest milage Jazz, I do have one that is fairly high and has lived a hard life and is a testament to Honda's reliability and build quailty, especially after what mine has been through and how I treat it.
It's a 2003 Jazz with the 1.4 Litre petrol engine in it and it's covered 133k miles, 21k of which I have done in the last 15 months.
Before me it was owned by an older man and did around 9k miles per year, but when I got it it's usage cycle changed dramatically. I bought it as a first car for £900 on the 7th of Febuary 2020 and ever since it's been hammered. My girlfriend live a half hour duel carraigeway journey from me and I used to have that car pinned at top speed late at night and when running up and over Haldon Hill in Devon to see her I would regularly have extended periods of redline running to keep speed in 4th over the hill.
I crossed Dartmoor in the snow from Okehampton to Tavistock and then onto Ashburton for fun with her back in febuary of this year and was up the axles in snow and mud, I suffocated the engine with snow it was so intense and to top it all of I spun out 6 times near Widdon Down near Okehampton.
I used to try and keep up with my friends in faster cars so redlined it a lot, crashed shifted when the gears wouldn't syncronise properly, done more handbrake turns and rollback burn outs than I can remember and it's been used as wrecker to pull my friends RWD cars in the snow by getting all 8 of them to sit on the bonnet to put some weight on the front axle. The car has been abused and it's done a fantastic job so hats off to Honda there as most 17 year old 130k mile cars would have packed up long ago.
The build quality in terms of impact resistance is increadible for such a small car. I had a woman reverse into me and you wouldn't know. I also hit a stag at around 40mph and although the front of the car is twisted and the bonnet is wrecked, the car still works just fine. I have two holes in the bodywork where the stags antlers swung around and smacked the car just below the drivers side wing mirror. I am 6ft tall and I'm not joking when I say his head was just as tall as me plus his antlers where another 2ft or so on top of that. He wouldn't have been light but the Jazz handled it and still works just fine.
My ex-girlfriend's little sister wanted to put the fuel in once on the way to the Beach earlier in the year and I wasn't paying attention and she filled it up with diesel without me realising and I only noticed 2 miles up the road. My fault I know but she was only 8 at the time so I couldn't be angry as shes not to know the differance.
Just to give you an idea of how it is driven, I ruined a set of front tyres in 4500mi.
That car has been through the wars more than a tank in Iraq and it still lives. Like I said, testament to Honda It really is.