Change Japanese input source settings on Mac
After you set up a Japanese input source, use Input Sources settings on your Mac to change options for the Japanese input methods.
To change these settings, switch to a Japanese input source, click the Input menu in the menu bar, choose Open [input source] Settings, then click the name of the input source in the sidebar. For example, choose Open Japanese - Romaji Settings, then click Japanese - Romaji in the sidebar.
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.
Note: This option isn’t available if you turn on “Use the Caps Lock key to switch to and from last used Latin input source” in Input Sources settings, which allows you to quickly switch between a non-Latin input source (such as Japanese with a Hiragana or Katakana input mode) and a Latin input source (such as Japanese with a Romaji input mode).
Shift key action
Set the Shift key to allow typing katakana or entering Romaji mode.
If the “Windows-like shortcuts” option (described below) is selected, this option automatically changes to “Enter Romaji mode.”
Automatically convert hiragana into relevant Japanese text, including kanji, as you type.
When you select this option, the “Convert with punctuation” option (described below) is automatically unselected.
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.
This option isn’t available if you select the Live Conversion option.
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. These are also the punctuation marks used to convert text if you select the “Convert with punctuation” option.
“/” 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.