Step 1: Recall Ashtavidha Shastra Karma.
Ashtavidha Shastra Karma lists eight surgical procedures described in classical Shalya Tantra, such as incision, excision and puncturing
Step 2: Check where Vamana fits.
Vamana is an emesis-based Panchakarma procedure, not a surgical instrument-based procedure
Step 3: State the answer.
So the statement that Vamana is not included in Ashtavidha Shastra Karma is true
\[ \boxed{True} \]