Japanese characters garbled in Nexus5

Model: Nexus5

Environment: AIR SDK 3.9

Trouble:

The source below, be set to any of the (font acquired other Font.enumerateFonts(true)) MotoyaLMaru or null,

for the font of TextFormat, Japanese is garbled.

var tf:TextField= new TextField();   

tf.defaultTextFormat = new TextFormat(

    null,            // or "MotoyaLMaru"

    30,             //

    0x0,

    false);           

tf.text = (Japanese characters)

I hope this will be fixed, thank you.