On (Japanese prosody) On (Japanese prosody) The term On (rarely "Onji") refers to counting phonetic sounds in Japanese poetry. In the Japanese language, the word ""on"" (音) means "sound". It is used to mean the phonetic units counted in haiku, tanka, and other such poetic forms. Known as "morae" to English-speaking linguists, the modern Japanese term for the linguistic concept is either "haku" () or "mōra" (). Ji (字) is Japanese for "symbol" or "character". The concatenation of the two words ""on"" and ""ji"" into ""onji"" (音字) was used by Meiji era grammarians to mean "phonic character" and was translated into English by
Haiku theoretician F. S. Flint, who passed on Couchoud's ideas to other members of the proto-Imagist Poets' Club such as Ezra Pound. Amy Lowell made a trip to London to meet Pound and find out about haiku. She returned to the United States where she worked to interest others in this "new" form. Haiku subsequently had a considerable influence on Imagists in the 1910s, notably Pound's "In a Station of the Metro" of 1913, but, notwithstanding several efforts by Yone Noguchi to explain "the hokku spirit", there was as yet little understanding of the form and its history. R. H. Blyth