As an inherent phoneme, the kana don't really "need" separate names, their pronunciation already works in sentences, although the columns (based on consonant) a

As an inherent phoneme, the kana don't really "need" separate names, their pronunciation already works in sentences, although the columns (based on consonant) and rows (based on vowel sound) do have their own designation, being 行(ぎょう) and 段(だん) respectively. For example, if you wanted to "precisely" talk about し, you could refer to it as さ行のい段 ("the i-dan entry in sa-gyou"), or even さ行のい段の「し」 ("the 'shi' that is the i-dan entry in sa-gyou")