| 1937/04 | HIROSHIMA CASTING KOGYO CO.,LTD. was established in Fuchu-cho,Aki-gun,Hiroshima-Pref., Castiron pipes,machine tool parts,and other products were manufactured. |
| 1953/05 | No.2 Factory was established in Mokage,Fuchu-cho,Hiroshima-Pref., Mass production of small parts such as parts for farm appliances,automobiles,vehicles,and city water was started. |
| 1957/12 | No.1 Factory was transfered to Myojinmachi,Kaita-cho,Aki-gun,Hiroshima-Pref., and the No.2 Factory followed.These two factories were integrated. |
| 1963/10 | Amalgamated with WADA KOSAKUSHO CO.,LTD. and YOSHIWA KOGYO CO.,LTD. was established for handing the total process,from casting manufacturing to machining and assembling. |
| 1973/04 | Muikaichi Factory was established in Nanukaichi,Yoshika-cho,Kanoashi-gun,Shimane-Pref., and DISA-2013 type automatic molding plant was set up. |
| 1977/04 | Assembling process for flywheels was started and directly connected with Mazda Motor Corporation, Engine Assembly Shop. |
| 1980/06 | AMF-07 type high-speed high-pressure flaskless molding plant was set up in Muikaichi Factory. |
| 1981/10 | A capital investment was made by Mazda Motor Corporation. |
| 1985/06 | Hatsumi Factory was established in Tanohara,Yoshika-cho,Shimane-pref., and APS-H5 type automatic molding plant was set up. |
| 1986/07 | Hatsumi Factory was expanded by adding a second production line in the DISA-MK3 type automatic molding plant. |
| 1989/06 | The capital entry to AJU METAL INDUSTRIAL CO.,LTD. was made and technical cooperation was concluded. |
| 1989/10 | Hatsumi Factory was expanded by adding a third production line in GF-AIM type automatic molding plant. |
| 1991/09 | FBM-3L type automatic molding A line was set up in Muikaichi Factory. |
| 1992/08 | AMF-07 type Flaskless molding line was updated to FBM-3L type automatic molding B line was set up. |
| 1995/12 | Small parts manufacturing department was transferred from Nitto Industry Co.,Ltd. |
| 1998/05 | DISA-2013 type automatic molding line in Muikaichi Factory was updated to DISA-MK5 type automatic molding line. |
| 1999/05 | The quality certification was granted by Mazda Motor Corporation. |
| 2000/06 | International quality specification ISO9002/QS-9000 certification was obtained. |
| 2002/04 | International quality specification ISO14001 certification was obtained. |
| 2004/10 | International quality specification ISO/TS16949 certification was obtained. |
| 2004/11 | Muikaichi Factory received the Award for TPM (Total Productive Maintenance) Excellence 2nd Category in 2004. |
| 2006/08 | Two of 5t/h Intermediate frequency furnaces were set up more in Muikaichi Factory. GF-AIM type automatic molding line in Hatsumi Factory was updated to ACE-5 type automatic molding line. |
| 2007/08 | APS-H5 type automatic molding line in Hatsumi Factory was updated to ACE-5 type automatic mo |
| 2014/08 | Cupola furnace in Muikaichi Factory was updated to Naniwa Roki cupola furnace with heat-exchanging control system from Sakagawa type. |
lding line.
