Font Variation for Japanese Hiragana "ri"

Mac OS X users who input Japanese may notice that the Hiragana character for "ri", U+308A, can appear in two different forms, shown below :

Which one is displayed depends on what font is used by the app or system. The main Japanese font, Hiragino, uses the first (connected) version, while the Osaka Japanese font and some fonts for Chinese and Korean, plus Arial Unicode, use the