Take a look at the 25 lb bags of Rice at Costco or Sams. Heavy cloth with reinforced plastic carry-handle.
I think the rules for luggage fees on foreign national carriers (JAL or All Nippon or KAL) may be different for citizens of those countries than for ‘foreigners’…compared to the non-subsidized American companies. It has been awhile since I was at LAX but the last time I watched a JAL 747 load up more than half of the passengers, Men Women and Children, boarding with one or two of those bags of Rice. I don’t think they were carrying an in-flight snack !!![}:)][;)]