Change Japanese input source preferences on Mac
On your Mac, use the Input Sources pane of Keyboard preferences to change options for the Japanese input methods. Before you can do this, you must set up a Japanese input source.
To change these preferences, click the Input menu in the menu bar, then choose Open [input source] Preferences. For example, choose Open Japanese - Romaji Preferences.
Note: You must be using a Japanese input source to see the preferences options in the menu.
Select the checkbox for each input mode you want to use.
Caps Lock action
Set the Caps Lock key to quickly switch input modes from Hiragana to either Katakana or Romaji.
For example, if you choose “On for ‘Katakana’ input,” pressing Caps Lock switches your input mode from Hiragana to Katakana.
Shift key action
Set the Shift key to allow typing katakana or entering Romaji mode.
If the “Windows-like shortcuts” checkbox (described below) is selected, this option automatically changes to “Enter Romaji mode.”
Select the checkbox to turn on Live Conversion, which automatically converts hiragana into relevant Japanese text, including kanji, as you type.
Automatically correct Japanese spelling errors or suggest candidates as you type.
Set your keyboard to behave like a Windows keyboard, and use Windows-like shortcuts.
When you set this option, the “Shift Key action” option is automatically changed to “Enter Romaji mode.”
Specify the font and font size to use in the Candidate window.
Have the Candidate window predict the most likely candidates for completing text as you type, based on what you previously typed and selected.
Convert with punctuation
Turn on the ability to convert text using punctuation marks (specified in the Punctuation setting, described below) instead of pressing the Space bar.
Set the keyboard layout to use for the Romaji typing method. By default, the typing method uses the most recent keyboard layout you used; if you want to always use a specific layout, set it here.
Specify the punctuation marks you want to use to convert text.
“/” key generates
If you use a JIS keyboard, set whether you enter a slash (／) or a middle dot (・) when you press the Slash key.
“¥” key generates
If you use a JIS keyboard, set whether you enter a backslash (＼) or a Yen sign (¥) when you press the Yen key.
Full-width numeral characters
Select the checkbox to enter numbers as full-width characters, which align with Japanese characters.
The list of speciality dictionaries available to you.
To export a specialty dictionary, select the dictionary in the list, then drag it to the desktop or to any folder in the Finder.
To import a specialty dictionary file or a text file you created, drag the file into the “Specialty dictionaries” box; or Control-click the box, then choose Install Dictionary from the shortcut menu.
If you want a dictionary that’s available on your Mac, iOS devices, or iPadOS devices, use a user dictionary. See Edit and use your user dictionaries.
As you convert kana to kanji, the input method learns your preferred conversions and shows them first in the Candidate window to save you time and effort. If you find those conversions become less accurate, click Reset to clear the conversion history and restart the learning.