Have a Mac? Want to write in Japanese? It’s a lot easier than you think!
Open up System Preferences by clicking on the Apple icon in the top left corner of the screen
Click on “Language & Text.”
Select the “Input Sources” tab to see all the different languages you can use.
Search for the Kotoeri option. In Japanese, Kotoeri means “word selection.” Check the box for Kotoeri.
The Input Menu should now show up in the Menu Bar in the top right of your screen, with a different icon depending on which language you have selected. If you have Japanese selected, the icon should be the Japanese character あ.
Once you’ve got Japanese selected, you can being writing! Start spelling out the words in romaji, and Kotoeri will start automatically changing it into kana. Hitting the spacebar will cycle through all of the kana’s possible kanji, and hitting enter will finalize your selection.