This award availability is for travel on August 19, 2026, departing Los Angeles (LAX) for Tokyo Narita (NRT). At 100,000 miles, you're saving roughly 40,000 miles compared to the ~140,000 miles United typically charges for business class on this transpacific route.
The low $6 tax and fee amount is worth highlighting—many international business class awards come with significant surcharges, but this redemption keeps out-of-pocket costs minimal.
Note that only 2 seats are showing as available, which makes this better suited for solo travelers or couples rather than larger families. If you need more seats, it may be worth searching nearby dates to see if additional availability opens up.
A practical tip: August is peak summer travel season to Japan, so finding discounted award space is less common. If your dates are flexible and you're planning a late-summer trip to Tokyo, this is worth locking in now rather than waiting.
How to book
Search for award availability and book directly through United at: https://www.united.com/en/us/book-flight/united-awards/search