Booking ANA Flights on ANA Website
ANA International Award Calendar
A new tool from ANA itself could help you find that needle in a haystack. The airline quietly rolled out a new “International Award Calendar” recently, letting users easily scroll through six months of ANA award availability to pinpoint those select few dates when business or first class seats are bookable – or plenty more in economy or premium economy.This new award calendar lets you quickly filter for available flights between regions – for example, between Japan and North America – and by cabin, too. You may just need to log in with an ANA Mileage Club account in order to use it. 
Seats.aero ANA First Class Finder
Note:
Amex is a transfer partner. It can take 48 hours or longer for the points to hit your account, which means that hard-to-find availability may disappear by the time a transfer clears.
You can only book flights for yourself and family members. No booking flights for friends using your ANA miles, unfortunately.
Other Options to Book ANA Flights
Booking ANA First Class for as few as 72,500 points using Virgin Atlantic or business class from just 52,500 points each way are some of the best deals in the world of points and miles … especially if you pair it with a massive transfer bonus. But nowadays, you can't book business class through Virgin Atlantic within the final two weeks before departure – making that redemption more or less impossible.
Air Canada Aeroplan is a decent option, especially since you can add a stopover in Tokyo for a few days before continuing onward in Asia for just 5,000 miles more. Nonstop flights to Tokyo from most U.S. cities will cost you 75,000 points each way … except the Seattle sweet spot, which clocks in at just 55,000 points each way. But these days, Aeroplan gets barely any of the availability you may see through ANA itself.
It's only a bit better using United MileagePlus, which charges 110,000 miles each way for ANA business class.