Enter characters using the Kana Table
You can enter hiragana, katakana, and romaji by using the Kana Table instead of the keyboard.
While using a Japanese input mode, choose Type Using Kana Table from the Input menu in the menu bar.
In the Kana Table, click the あ (hiragana), ア (katakana), or A (romaji) tab.
Click the character you want to enter.