A social system; regime.

system; institution

accomplish, perform, fulfill

the above / the top (position or direction) / the surface of / superior in skill, age, level, etc.

in addition; furthermore / on top of (which)

role

(law, historical, rare) a set of codes and laws enacted during between the Asuka and Nara periods, influenced by a similar model in Tang-dynasty China

(law, historical) a set of codes and laws enacted during between the Asuka and Nara periods, influenced by a similar model in Tang-dynasty China

important, significant

importance, consequence, significance