Nihon-shiki: Béda antarrépisi

*[[Geminate consonant]]s are marked by doubling the consonant following the [[sokuon]], っ, without exception.

 

 

*''Nihongo Daihakubutsukan'' (日本語大博物館), author: Jun'ichirō Kida (紀田順一郎), publisher: Just System (ジャストシステム, ''Jasuto Shisutem'') ISBN 4883090469 (in Japanese), chapter 6.