Searching for "2021" specifically indicates one of two things:
Search on community-driven sites like Reddit (r/jav, etc.) or specific Japanese AV forums. AV Databases: Kansai Enkou 45 Chiharu 2021
The impact of Kansai Enkou 45 Chiharu 2021 was multifaceted. It not only [specific outcome, e.g., raised awareness about a particular issue] but also [another outcome]. The collaboration demonstrated the power of community-driven initiatives and the importance of [specific theme or value]. Searching for "2021" specifically indicates one of two