American, Alaska Airlines, and JAL have one-way Business class flights from San Antonio (SAT) to Tokyo (HND/NRT) for 60,000 points + $5.60 tax/fees with a connection. Fare allows for carry-on bag and seat selection. Most outbound departures are between Apr 21st and May 3rd. Very limited availability, two or three seats per date.
Booking flights with miles/points is worthwhile when the cost of airfare is high.
When searching for your flight, use the fare calendar on American’s website and filter by Business class, then sort the fares by lowest cost.