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Concept
Japanese pitch accent
Summary
Japanese pitch accent is a feature of the Japanese language that distinguishes words by accenting particular morae in most Japanese dialects. The nature and location of the accent for a given word may vary between dialects. For instance, the word for "now" is [iꜜma] in the Tokyo dialect, with the accent on the first mora (or equivalently, with a downstep in pitch between the first and second morae), but in the Kansai dialect it is [i.maꜜ]. A final [i] or [ɯ] is often devoiced to [i̥] or [ɯ̥] after a downstep and an unvoiced consonant.
Normative pitch accent, essentially the pitch accent of the Tokyo Yamanote dialect, is considered essential in jobs such as broadcasting. The current standards for pitch accent are presented in special accent dictionaries for native speakers such as the Shin Meikai Nihongo Akusento Jiten (新明解日本語アクセント辞典) and the NHK Nihongo Hatsuon Akusento Jiten (NHK日本語発音アクセント辞典). Newsreaders and other speech professionals are required to follow these standards.
Foreign learners of Japanese are often not taught to pronounce the pitch accent, though it is included in some noted texts, such as Japanese: The Spoken Language. Incorrect pitch accent is a strong characteristic of a "foreign accent" in Japanese.
In standard Japanese, pitch accent has the following effect on words spoken in isolation:
If the accent is on the first mora, then the pitch starts high, drops suddenly on the second mora, then levels out. The pitch may fall across both morae, or mostly on one or the other (depending on the sequence of sounds)—that is, the first mora may end with a high falling pitch, or the second may begin with a (low) falling pitch, but the first mora will be considered accented regardless. The Japanese describe this as 頭高 atamadaka (literally, "head-high").
If the accent is on a mora other than the first or the last, then the pitch has an initial rise from a low starting point, reaches a near-maximum at the accented mora, then drops suddenly on any following morae. This accent is referred to as 中高 nakadaka ("middle-high").
Official source
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