Japanese use many characters in the emails, blogs or sites everyday on PC or cellphone, for example Hirakana, Katakana, Kanji, Alphabet and Number.
And one more we usualy use face letters (emoticon/smiley) called Kaomoji, kao means a face, moji is letters.
Like : -) (^ ^)
Probably Japanese think that we can't communicate their emotions only letters certainly, so we add Kaomoji to words to moderate expression.
Kaomoji might say one kind of Japanese concern.
I can show you same Kaomoji, but maybe some of them can't display certainly except Japanese, Korean and Chinese computer.
(＝⌒▽⌒＝) (^_^) (⌒-⌒) ＼(＾▽＾)／ ヽ(´▽｀)/ ヾ(@~▽~@)ノ
w|;ﾟﾛﾟ|w w(ﾟoﾟ)w w(ﾟoﾟ*)w Σ(･口･)
( ￣っ￣) (｀ε´) (￣へ ￣ 凸 ＼(*｀∧´)／
(Ｔ＿Ｔ） (T△T) （；へ：） 。・ﾟﾟ･(≧д≦)･ﾟﾟ･｡ （；へ：）
(^-^*)/ ( ´_ゝ`)ﾉ (*~▼~)ﾉ
<(_ _*)> ｱﾘｶﾞﾄ♪(*ﾟ 3ﾟ)/~ﾁｭｯ♪ ( v^-ﾟ)Thanks♪
m(-_-)m (*_ _) ヾ(^-^；)