It looks like Japan Airlines is using some discounted award ticket offers to fill flights that may not be selling that well. One example is this new offer for specific flights between Tokyo Narita and Paris. You can save up to 16,000 Mileage Bank Miles when you fly on JL415 or JL416.
Receive up to 16,000 Mileage Bank Miles when you book and fly on award
tickets between Tokyo and Paris on flights JL415/416. Register Online (Regsitration is required) Nov 10 – Feb 28, 15
Mileage Rebate is as follows:
JL415 Business Class: 10,000 miles / Economy Class: 6,000 miles
JL416 Business Class: 6,000 miles / Economy Class: 4,000 miles
Be sure to visit our Mileage Bank Bonus Miles page for many more bonus and discounted mileage offers!