You can transfer to ITC first with ratio of 5:4.4 including the 10% bonus. Then transferring to Marriot and to Cathay gives 5:2.2 ratio which is slightly better. You can compare this method against JAL requirement and see which one works out the best. However, ITC to Marriot conversion has a long waiting time and a quarterly cap as well at 15K. So it depends on your travel plan. Alternatively, you can also try Aeroplan which has some really good sweetspots as their award chart is based on distance and region. But you might have to contact their call center if you have to book flights to and from India.