|Seat||Minato , Tokyo Prefecture , Japan|
|Number of employees||13,432|
|sales||1,773 billion yen (14.1 billion euros )|
|As of March 31, 2015|
KK Ōbayashi-gumi ( Japanese 株式会社 大林 組 , Kabushiki kaisha Ōbayashi-gumi , Eng . "Ōbayashi-Gruppe", Eng. Obayashi Corporation ), listed in the Nikkei 225 , is one of the five largest construction companies (Super- Zenekon ) next to Shimizu , Takenaka , Kajima and Taisei in Japan . The company's headquarters are in Minato , Tokyo Prefecture .
The group was founded in Osaka in 1892 . The company operates in Japan and a few other countries, particularly Southeast Asia and Australia, but also in the United States and Europe.
The company plans to build a space elevator by 2050 .