- 2018.12.26
- "Making History" was updated.
- 2018.12.25
- "Technical Report" was updated.
- 2018.09.28
- “CSR” site was redesigned.
- 2018.08.28
- "Making History" was updated.
- 2018.06.28
- "Corporate Profile" was updated.
- 2018.06.25
- “Technical Report” was updated.
- 2018.05.09
- "Corporate Profile" was updated.
- 2018.04.02
- "Management Structure" was updated.
- 2018.02.01
- "Making History" was updated.