On April, 2011, Sumitomo Corporation acquired CSK Corporation by Takeover, then on October, 2011, Sumitomo Computer System Corporation and CSK Corporation were merged, the company name was changed to SCSK Corporation.
Sumitomo Corporation acquired CSK Corporation by Takeover, then on October, 2011, Sumitomo Computer System Corporation and CSK Corporation were merged, the company name was changed to SCSK Corporation. This was on April. April was 2011.