What's the mileage reading now?
What model Toyota and how old is it?
Probably best to go to a Toyota dealer or get someone to translate it.
Hard to prove anything though, need to start looking back at the history of the car really.
If they say it's due a belt change at 98,957 km (approx 60,000 miles), this would mean that it's already had a belt change since new.
This would be indicated by the label having a specific figure instead of just 100,000 km, if you see what I mean!
If it has got such a low mileage it should still be awaiting it's first belt change.