Na-adjective (keiyodoshi), Nounscarce; rare

Na-adjective (keiyodoshi), Nounthin (air); weak (liquid); dilute; sparse (population); rarefied · lacking (enthusiasm, consideration, substance, etc.); insubstantial; deficient; tenuous (link)

Noun which may take the genitive case particle 'no', Na-adjective (keiyodoshi), Noununcommon; rare; extraordinary; matchless

Na-adjective (keiyodoshi), Nounrare; uncommon

Na-adjective (keiyodoshi)unusual; rare