Early Middle Japanese in the context of "Late Middle Japanese"

Japanese poetry is poetry typical of Japan, or written, spoken, or chanted in the Japanese language, which includes Old Japanese, Early Middle Japanese, Late Middle Japanese, and Modern Japanese, as well as poetry in Japan which was written in the Chinese language or ryūka from the Okinawa Islands: it is possible to make a more accurate distinction between Japanese poetry written in Japan or by Japanese people in other languages versus that written in the Japanese language by speaking of Japanese-language poetry. Much of the literary record of Japanese poetry begins when Japanese poets encountered Chinese poetry during the Tang dynasty (although the Chinese classic anthology of poetry, Shijing, was well known by the literati of Japan by the 6th century). Under the influence of the Chinese poets of this era Japanese began to compose poetry in Chinese (kanshi); and, as part of this tradition, poetry in Japan tended to be intimately associated with pictorial painting, partly because of the influence of Chinese arts, and the tradition of the use of ink and brush for both writing and drawing. It took several hundred years to digest the foreign impact and make it an integral part of Japanese culture and to merge this kanshi poetry into a Japanese language literary tradition, and then later to develop the diversity of unique poetic forms of native poetry, such as waka, haikai, and other more Japanese poetic specialties. For example, in the Tale of Genji both kanshi and waka are frequently mentioned. The history of Japanese poetry goes from an early semi-historical/mythological phase, through the early Old Japanese literature inclusions, just before the Nara period, the Nara period itself (710 to 794), the Heian period (794 to 1185), the Kamakura period (1185 to 1333), and so on, up through the poetically important Edo period (1603 to 1867, also known as "Tokugawa") and modern times; however, the history of poetry often is different from socio-political history.

In the Japanese language, the gojūon (五十音; Japanese pronunciation: [ɡo(d)ʑɯꜜːoɴ], lit. 'fifty sounds') is a traditional system ordering kana characters by their component phonemes, roughly analogous to alphabetical order. The "fifty" (gojū) in its name refers to the 5×10 grid in which the characters are displayed. Each kana, which may be a hiragana or katakana character, corresponds to one sound in Japanese. As depicted at the right using hiragana characters, the sequence begins with あ (a), い (i), う (u), え (e), お (o), then continues with か (ka), き (ki), く (ku), け (ke), こ (ko), and so on and so forth for a total of ten rows of five columns.

Although nominally containing 50 characters, the grid is not completely filled, and, further, there is an extra character added outside the grid at the end: with 5 gaps and 1 extra character, the current number of distinct kana in a moraic chart in modern Japanese is therefore 46. Some of these gaps have always existed as gaps in sound: there was no yi or wu even in Old Japanese, with the kana for i and u doubling up for those phantom values. Ye persisted long enough for kana to be developed for it, but disappeared in Early Middle Japanese, having merged with e. Much later, with the spelling reforms after World War II, the kana for wi and we were replaced with i and e, the sounds they had merged with. The kana for moraic n (hiragana ん) is not part of the grid, as it was introduced long after the gojūon ordering was devised. (Previously mu (hiragana む) was used for this sound.)

Old Japanese (上代日本語, Jōdai Nihon-go) is the oldest attested stage of the Japanese language, recorded in documents from the Nara period (8th century). It became Early Middle Japanese in the succeeding Heian period.Old Japanese is an early member of the Japonic language family. No genetic links to other language families have been proven.

The bulk of the Old Japanese corpus consists of poetry, especially the Man'yōshū, with a smaller number of formal prose works. These texts were written using man'yōgana, a writing system that employs Chinese characters as syllabograms or (occasionally) logograms. The language featured a few phonological differences from later forms, such as a simpler syllable structure and distinctions between several pairs of syllables that have been pronounced identically since Early Middle Japanese. The phonetic realization of these distinctions is uncertain. Internal reconstruction points to a pre-Old Japanese phase with fewer consonants and vowels.