If you want a cheap flight from Inverness to Sapporo, you've got one airlines to choose from.
You can use the filters on your search to see more flights and find cheaper rates – Sapporo has more than one airport. So if you don't need to fly into New Sapporo International Airport, it's worth checking your other options. The 8421 km flight usually takes about 23 hrs 55 mins.
If you're planning on going to Sapporo during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.