十歳，じゅっさいか。じっさいか。 It is always confusing when finding different pronunciation of same words in a language. It happened again recently while I encountered the word 十歳. It is written じゅっさい in one of my textbook and じっさい in another... Could someone please explain why this difference and which one is more generally used? Thank you for your reply! :)to aoitory: 謝謝你的回應！只是じゅっさい應該並沒錯，因為我課本裡正是教促音的發音(同樣如三十歲也是寫成さんじゅっさい)，日文輸入法打じゅっさい也是出現十歳。所以才想知道哪種用法比較常見，而這樣的區別究竟是不同地方的念法不同呢？還是不同場合的說法不同？