This short article documents floral visitors or possible pollinators for the flower of two Japanese Pinguicula species, P. macroceras Link and P. ramosa Miyoshi, presumably the first witness to be reported. It is widely believed that those Pinguicula flowers are basically pollinated by insects, but what kinds was previously unknown. The author has confirmed at some natural localities, floral visits of a sweat bee species on a flower of P. macroceras and of hoverflies and ocellate rove beetles on P. ramosa flowers.