J-PARC hadron experimental facility extension project Fuminori Sakuma, Kazuya Aoki, Hiroyuki Fujioka, Toshiyuki Gogami, Yoshimasa Hidaka, Emiko Hiyama, Ryotaro Honda, Atsushi Hosaka, Yudai Ichikawa, Masaharu Ieiri et al. (33 more) EPJ Web Conf., 271 (2022) 11001 Published online: 09 November 2022 DOI: 10.1051/epjconf/202227111001