I was faced with five different brands of curry block when I arrived at the Japanese grocery store. Based on some online research I choose Kokumaro medium hot and then proceeded with the attempt.
I used grated apple to moderate the curry (as opposed to honey or milk).
I'd estimate I got within 90% of the JAL lounge offering. I would describe the lounge curry to have have more beef flavor and the curry flavor to be more subtle than my version.
One discovery, my curry attempt was tastier after a day in the refrigerator.
It still needs additional work -- and further research
MO