Autosport magazine 2021 GT500 silly season report.
https://www.as-books.jp/books/info.php?no=AST20201225
https://www.as-books.jp/books/preview.php?no=7506
Honda: Oyu might step up to GT500? Matsushita will compete in GT500?
Toyota: Kenta Yamashita will join Team Tom's as substitute for Cassidy? Sena Sakaguchi might step up to GT500?
Nissan: Lucas Auer and DTM driver will participate in NISMO driver's audition?