From May 21 through 22, the Safety Review for the ACA 7-m antenna, developed by ALMA-J, was held in Amagasaki, Japan. This was the first time that the 7-m antenna was observed by the reviewers including some from overseas. In the review, the safety on the 7-m antenna was reviewed in detail, and the reviewers gave the approval to its safety design. The picture shows the participants in the review (in front of the ACA 7-m antenna).