1985 ¡늹ɷÝÓÐÏÞ¹«Ë¾¤òÔOÁ¢
1998 ¡늹ɷÝÓÐÏÞ¹«Ë¾¡¡Öйú¥·¥ó¥»¥ó¥ª¥Õ¥£¥¹¤òÔOÁ¢£¨LTZ)
2002 ¡늹ɷÝÓÐÏÞ¹«Ë¾¡¡ÖйúÉϺ£¥ª¥Õ¥£¥¹¤òÔOÁ¢£¨LTS)
2003 ¶þËữ¥Þ¥ó¥¬¥ó¥ê¥Á¥¦¥à늳Ø(¥³¥¤¥ó) ¼Ó¹¤¹¤ˆö¡¡ÖǺë¿Æ¼¼¹É·ÝÓÐÏÞ¹«Ë¾¤òÔOÁ¢
2006 ¬F½ð‰ˆ¼Ó¡¢Œg…§ÙY±¾î~£Î£Ô£Ä5,000Èf¤Ëß_¤¹¤ë
2008 ISO9001:2000ÕJÔ^È¡µÃ£¨2008¡«2011£©
2015 ¬F½ð‰ˆ¼Ó¡¢Œg…§ÙY±¾î~£Î£Ô£ÄÒ»ƒ|Ôª¤Ëß_¤¹¤ë
2018 ISO 9001£º2015¤ËºÏ¸ñ
2019 ¬F½ð‰ˆ¼Ó¡¢Œg…§ÙY±¾î~£Î£Ô£ÄÒ»£®Îåƒ|Ôª¤Ëß_¤¹¤ë