History
| 1975 | June | SHIN TSURUKAI KOHSAN CO.,LTD. was established with a capital of yen 10 million. |
| Nov | Driving range TSURUKAI GOLF CENTER was established. | |
| 1981 | July | A capital was increased to yen 20 million. |
| 1985 | May | New office was established and Electronics Dept. was moved to new office. |
| June | A capital was increased to yen 40 miillion. | |
| 1988 | June | Semiconductor plant (No.1) was established. |
| 1990 | Jan | Precision sheet metal plant was established. |
| 1995 | May | Mecahtronics plant and Mechanical processing plant was established. | Nov | Yokkaichi office was opened. |
| 1999 | April | Joint venture company HSINHO ADVANCED TECHNOLOGY INC. was established in Taiwan. |
| May | Oversea Subsidiary was established in Malaysia. | |
| Nov | Semiconductor plant (No.2) was established. | |
| 2000 | Jan | Electronics Dept acquired ISO9001. |
| March | Ebisudo plant was established. | |
| April | Name of company was changed to STK TECHNOLOGY CO.,LTD. | |
| Dec | Tokyo office was opened. | |
| 2001 | June | A capital was increased to yen 181 miillion. |
| July | Fukuoka office was opened. | |
| 2003 | Sep | Semiconductor Dept acquired ISO14001. |
| 2004 | March | Semiconductor Dept acquired ISO9001. |
| 2005 | May | Semiconductor Plant (No.3) was established. |
| 2006 | April | Nagoya office was opened. |
| June | Aosaki plant was acquired. | |
| Sep | Head office, Electronics Dept, Precision sheet metal plant and Machine & Milling Dept acquired ISO14001. | |
| 2008 | April | Aosaki plant was acquired. |
| 2010 | Sep | ISO14001 was changed to unification system (head office and all of Oita plants). |
