Translation guide
Soft tennis is a racket sport similar to regular tennis but played with soft rubber balls. The term is used as-is in Japanese, often as a loanword.
Referring to the sport of soft tennis
The standard Japanese term for soft tennis, a direct loanword from English.
彼はソフトテニス部に入った。
He joined the soft tennis club.
Literally 'soft-style tennis', used in formal contexts or to distinguish from hard tennis.
軟式テニスの大会が開催されます。
A soft tennis tournament will be held.