The contract value is calculated at JPY 1,000 times the Nikkei average.
The "tick" or minimum fluctuation is JPY 10 (e.g., points) which is what you would see on a chart or in the quotes. However, the "value" of that minimum fluctuation would be 10 X 1,000 or JPY 10,000 (e.g., minimum value). With the yen rising today (around JPY 112/$) that would be about $89 per tick.
The TSE TOPIX futures trade at a contract value of JPY 10,000 per point but the minimum fluctuation (tick) is 0.5 point so the value is JPY 5,000 or currently about $45).