Just ticketed RGN-BKK-HND-stopover NRT-SEA-LAX and reverse using matrix power tools (greasemonkey) on Priceline for 2220 USD (200 USD for stopovers included).
Taking advantage of the double miles campaing on NRT-SEA (valid until 31st May 2019), raking me a total of 54K JAL miles.
But, I might bank these flights on Alaska....