I was wondering how to type these icons - seems like all Japanese people know how. My sister C. taught me.
Using the Japanese keyboard, for star type "hoshi"
ほし... and press space bar until you get ★。
For cloud it's "kumo"
and space until you get ☁。
And for note it's "onpu"
and space until ♪。
There are others too like sun ☀、rain ☂、etc.