I finally found a restaurant in Brussels where you can order Japanese draft beer! Here is the IZAKAYA restaurant, near the Flagey square. The place is quite noisy and smoky because of the yakitori grills, but that makes a great ambience! Like a real Japanese bar. Something strange: half of the staff are indian. So get quickly from the Japanese accent to the Indian one and so it sounds a bit strange.
Be aware: at night, there are lots of people coming to this restaurant (lots of Japanese ones actually) and without booking, you won’t get in!
Chaussée de Vleurgat, 123
OPEN FROM MONDAY TO SATURDAY BETWEEN 12H AND 14H, 19H AND 22H30