(⌒▽⌒)ノ　In addition, 祥子 早智子 砂智子 禎子 佐千子 沙千子 倖子　サチ子　さち子...　＿¢(。。;)　

You can write your Japanese name, Sachiko in three ways; Hiragana, Katakana and Kanji. Hiragana and Katakana are phonetic script, so さちこ for Hiragana, サチコ for Katakana. There are many variations of Kanji on Sachiko; 幸子　佐知子　佐智子　紗智子 ..... Therefore, if you want to know which you should write, 幸子 or サチコ, the answer is both ^-^