Denshi Jisho — Online Japanese dictionary

そうする to do so; to do thus
Expression, Suru verb - irregular 
奏する そうする 1: to report to the Emperor;
2: to play (musical instrument);
3: to accomplish
Suru verb - special class, Transitive verb 
相する そうする to assess (often one's fate)
Suru verb - special class, Transitive verb 
草する そうする to draft; to write a rough copy
Suru verb - special class, Transitive verb 
そうする having done that; if that is done; if it is done in that way
Common word, Expression 

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