Rendaku

Rendaku (^?, lit. "sequential voicing") is a phenomenon in Japanese morphophonology that governs the voicing of the initial consonant of the non-initial portion of a compound or prefixed word. In modern Japanese, rendaku is common but at times unpredictable, with certain words unaffected by it.

While kanji do not indicate rendaku, they are marked in kana with dakuten (voicing mark).

Rendaku can be seen in the following words:

In some cases, rendaku varies depending on syntax. For instance, the suffix tōri (〜通り^?, "road, following"), from tōru (通る^?, "to go, to follow"), is pronounced as -tōri (〜とおり^?) following the perfective verb tense, as in omotta-tōri (思った通り^?, "as I thought"), but is pronounced as -dōri (〜どおり^?, with rendaku) when following a noun, as in yotei-dōri (予定通り^?, "as planned, according to schedule") or, semantically differently – more concretely – Muromachi-dōri (室町通^?, "Muromachi Street").

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