This is probably only relevant for US citizens with Choice accounts and addresses in the US. You also may need a US credit card to purchase.
Choice is offering a bonus for transfers of 5,000 points. Now that gets you 2,000 UA miles.
That in itself isn't amazing, but with Daily Getaways now online, the Choice packages sell points quite cheap, so in the end you can get your UA miles for well under 2 US cents each.
There are issues to actually getting the Choice bonus applied, so no guarantees yet.
The Choice packages themselves are a pretty good deal, and can shave 10-50% off the cash rates in Japan.
https://dailygetaways.ustravel.org/