Write-ups for workshop on the project for the hadron experimental facility of J-PARC, Partial collection of LOIs at the extended hadron hall and the related topics

W.Ikegami Andersson (8) K.Aoki (7 9) H.Asano (6) S.Bleser (1) E.Botta (10 11) M.B\"olting (1) WC.Chang (12) A.Feliciello (10) H.Fujioka (13) M.Hassanvand (6 14) R.Honda (15) Y.Ichikawa (16) T.Ishikawa (18) K.Itahashi (6) Y.Komatsu (7 K.Miwa (15) Y.Miyachi (19) Y.Morino (7 T.Nakano (4) S.N.Nakamura (15) M.Naruki (20) H.Noumi (4 H.Ohnishi (17) S.Okada (6) K.Ozawa (7 J.Pochodzalla (1 H.Sako (16 F.Sakuma (6) T.Sawada (21) F.Schupp (1) K.Shirotori (4) M.Steinen (1) Y.Sugaya (4) K.Suzuki (18) H.Takahashi (7 T.Takahashi (7 T.N.Takahashi (4) K.Tanaka (16 N.Tomida (4) M.Ukai (7 T.Yamaga (6) T.Yamamoto (7 9 *) T.Yamazaki (22 6) S.Yang (3) M.Yue (6) J-PARC KOTO Collaboration (3 5 7 19 20 23-31) ((1) Helmholtz Institute Mainz Johannes Gutenberg University (2) Institute for Nuclear Physics Johannes Gutenberg University (3) Department of Physics Korea University (4) Research Center for Nuclear Physics (RCNP) Osaka University (5) Department of Physics Osaka University (6) RIKEN (7) Institute of Particle Nuclear Study (IPNS) High Energy Accelerator Research Organization (KEK) (8) Department of Physics Astronomy Uppsala University (9) J-PARC Center (10) Istituto Nazionale di Fisica Nucleare (INFN) Sezione di Torino (11) Department of Physics Torino University (12) Institute of Physics Academia Sinica (13) Department of Physics Tokyo Institute of Technology (14) Department of Physics Isfahan University of Technology (15) Physics Department Tohoku University (16) Advanced Science Research Center (ASRC) Japan Atomic Energy Agency (JAEA) (17) Research Center for Electron Photon Science (ELPH) Tohoku University (18) Stefan Meyer Institute Austrian Academy of Sciences (19) Department of Physics Yamagata University (20) Department of Physics Kyoto University (21) Department of Physics University of Michigan (22) Physics Department University of Tokyo (23) Department of Physics Arizona State University (24) Enrico Fermi Institute University of Chicago (25) Division of Science Education Chonbuk National University (26) Department of Physics Jeju National University (27) Laboratory of Nuclear Problems Joint Institute for Nuclear Researches (JINR) (28) Department of Applied Physics National Defense Academy (29) Research Institute for Interdisciplinary Science Okayama University (30) Department of Physics Saga University (31) Department of Physics National Taiwan University * Present address Advanced Science Research Center (ASRC) Japan Atomic Energy Agency (JAEA))