With a six inch overhang all around this should be quite stable. However…
…beware of elbows (when sitting) and a splayed hand (when standing) supporting your reach across the table. Too close to the edge will create quite a realistic earth quake.
I speak from experience of a game of Shogun and a table with fundamentally the same design whilst on holiday. Though thematically appropriate the multiple tremors during the game were not conducive to a relaxation.