[1] Japan Powder Metallurgy Association, 3-42-7 Taito, Taito-ku, Tokyo
[2] Diamet Corporation, 3-1-1 Kogane-cho, Higashi-ku, Niigata
[3] Sumitomo Electric Sintered Alloy, Ltd., 2901 Nariwa, Nariwa-cho, Takahashi
[4] FINE SINTER CO., LTD., 1189-11 Nishinohora, Akechi-cho, Kasugai
[5] PORITE CORPORATION, 350 Kamiebukuro, Kumagaya
[6] NTN Advanced Material Corporation, 101 Katsutaba, kanieshinden, Ama-gun, Kanie-cho
[7] NPR-RIKEN CORPORATION, 1111 Nogi, Nogi-machi, Shimotsuga-gun
[8] Osaka University, 1-11 Mihogaoka, Ibaraki