binom

— Where you would expect to hear AN na N you may instead find, especially in written Japanese, AN no N. The latter, somewhat stiffer, version appears to enjoy particular favor when the AN is a binom of Chinese origin modifying another Chinese binom and the two words are either optionally combinable into a compound noun (by dropping the copula nó/ná together with its juncture and applying the proper accentuation) or look as if they might easily so combine.