$$ \newcommand{\HIRANO}{\unicode[sans-serif,STIXGeneral]{x306E}} % HIRAGANA LETTER NO (U+306E) \begin{array}{cc} x_k - \mu & \text{$x_k$の偏差} \\ x_k - \mu & \text{$x_k\HIRANO$偏差} \\ \end{array} $$ 出力 \[ \newcommand{\HIRANO}{\unicode[sans-serif,STIXGeneral]{x306E}} % HIRAGANA LETTER NO (U+306E) \begin{array}{ll} x_k - \mu & \text{$x_k$の偏差} \\ x_k - \mu & \text{$x_k\HIRANO$偏差} \\ \end{array} \] 拡大画像