| April 1994 | Established YGK CORPORATION, Developed “Particle counter”. |
| 1997 | Relocated factory to current address. |
| 2003 | Extension factory. |
| 2007 | Developed inspection system for wafer edge. |
| 2009 | Developed surface isolating function for transparent wafer |
| 2010 | Developed inspection system for thin film on Roll to Roll. |
| 2011 | Developed handy type of particle counter. |
| 2012 | Received award of “Yamanashi Prefecture” |
| 2013 | Developed desk top model of YPI-MN. |
| 2014 | Developed YPI-MX-DC inspection system for Silicon carbide / Gallium nitride wafer |
| 2017 | Developed enhanced control system for YPI-MX-DC |
| 2020 | Developed tape frame inspection system for YPI-MX TF. |
| 2022 | Acquired CE regulation. |
| 2023 | Extension factory. |
| April 2024 | 30 years anniversary. |
| 2024 | Developed XGS inspection system for glass polish confirmation. |
