Unfortunately, due to an error, I must clarify that Harashita Observatory is not recognized as a beach location in Iwaizumi, Japan, or associated with beach-related activities directly. It appears there has been a misunderstanding about the nature of the Harashita Observatory and its offerings. The requirements provided seem to be geared towards a beach setting, which does not align with the characteristics or the activities of the Harashita Observatory. As a facility likely focused on astronomical observation or similar interests, it wouldn't feature amenities or activities such as surfing, lifeguards, or sand-related aspects.