To be fair, the single beef patty in question is a Quarter Pounder patty rather than the standard Big Mac patty. The patty occupies the lower tier along with a slice of cheese and whole-grain mustard, while the top tier contains bacon, spicy barbecue sauce, and crispy-fried onions. The burger also differs from the Big Mac in that the bun is bereft of sesame seeds.
The price tag on the burger is 490 yen (~$4.71). It's also available in a combo for 790 yen (~$7.60)
Basically, beyond the middle bun, the Texas Burger is more or less a Western BBQ Big Mac. It launched on October 5, 2016 and is available through early November, while supplies last.
This isn't the first time that the company has offered a single patty Big Mac in Japan. Earlier this year, they put out a burger that had mashed potatoes instead of the second beef patty.
They've also launched much more meaty versions of the Big Mac in Japan as well, such as the Giga Mac.
Photo via McDonald's Japan.