ANA redemptions are pretty flexible and straightforward.
As stargold indicates, distance traveled by each segment counts.
ANA awards can be good values for shorter trips with multiple stopovers; they are less attractive for longer trips (e.g., NH is attractive for Europe trips from the East coast of the US, but less attractive from the West coast), but you can do your own calculations.
On a side note, don't forget that LX is also available for NH awards, but you have to call to redeem on LX.