| 1949 |
日立：純国産技術により日立U05パワーショベル完成。 |
| 1949 |
1949 : HCM : Developed the Hitachi U05 power shovel based entirely on Japanese technology. |
| 1955 |
日立：日立建設機械サービス株式会社設立。 |
| 1955 |
1955 : HCM : Hitachi Construction Machinery Service Co., Ltd. established. |
| 1957 |
日立：日立U106万能掘削機完成。 |
| 1957 |
1957 : HCM : Developed the Hitachi U106 multi-purpose excavator. |
| 1963 |
住友：住友機械工業（株）に建機事業部を新設。クロ－ラクレーン及びトラッククレーンについて、アメリカのLink-Belt社と技術提携。建機の国内総代理店として販売会社の住機建設機械販売（株）を設立。 |
| 1963 |
1963 : SHI : Sumitomo Machinery Co., Ltd. created a construction machinery division. It entered into a technological partnership with Link-Belt Construction Equipment Company in the US for crawler cranes and truck-mounted cranes. Sumitomo Construction Machinery Sales Co., Ltd. established as the exclusive sales distributor in Japan for construction machinery. |
| 1963 |
住友：住友機械工業（株）に建機事業部を新設。クロ－ラクレーン及びトラッククレーンについて、アメリカのLink-Belt社と技術提携。建機の国内総代理店として販売会社の住機建設機械販売（株）を設立。 |
| 1963 |
1963 : SHI : Sumitomo Machinery Co., Ltd. created a construction machinery division. It entered into a technological partnership with Link-Belt Construction Equipment Company in the US for crawler cranes and truck-mounted cranes. Sumitomo Construction Machinery Sales Co., Ltd. established as the exclusive sales distributor in Japan for construction machinery. |
| 1964 |
住友：「住友-リンク・ベルト」ブランドにて機械式トラッククレーンを販売開始。 |
| 1964 |
1964 : SHI : Began selling mechanical truck-mounted cranes under the “Sumitomo-Link-Belt” brand name. |
| 1964 |
住友：「住友-リンク・ベルト」ブランドにて機械式トラッククレーンを販売開始。 |
| 1965 |
日立：株式会社日立製作所の建設機械販売部門各社及び日立建設機械サービス各社が合併し、（旧）日立建機株式会社設立。 |
| 1965 |
1965 : HCM : The various construction machinery sales subsidiaries of Hitachi, Ltd. were merged with Hitachi Construction Machinery Service Co., Ltd. to form the former Hitachi Construction Machinery Co., Ltd. |
| 1969 |
日立：株式会社日立製作所の建設機械製造門が分離独立。足立工場・土浦工場をもって日立建設機械製造株式会社設立。 |
| 1969 |
1969 : HCM : The construction machinery manufacturing division of Hitachi, Ltd. was spun-off as an independent company. It was combined with the Adachi and Tsuchiura factories to form Hitachi Construction Machinery Manufacturing Co., Ltd. |
| 1970 |
日立：日立建設機械製造株式会社と（旧）日立建機株式会社が合併し、日立建機株式会社設立。 |
| 1970 |
1970 : HCM : Hitachi Construction Machinery Manufacturing Co., Ltd. was formed by merging Hitachi Construction Machinery Manufacturing Co., Ltd. and the former Hitachi Construction Machinery Co., Ltd. |
| 1971 |
日立：日本初の全油圧式クローラクレーンKH150発売。 |
| 1971 |
1971 : HCM : Release of KH150, Japan’s first fully hydraulic crawler crane. |
| 1971 |
日立：日本初の全油圧式クローラクレーンKH150発売。 |
| 1974 |
日立：工場再配置政策及び生産体制整備のため足立工場を土浦工場へ統合。 |
| 1974 |
1974 : HCM : Operations of the Adachi plant are consolidated into the Tsuchiura plant as part of a factory relocation plan and to reinforce production capacity. |
| 1974 |
日立：工場再配置政策及び生産体制整備強化のため足立工場を土浦工場へ統合。 |
| 1975 |
住友：全油圧式クローラクレーン販売開始。 |
| 1975 |
1975 : SHI : Sales begun of fully-hydraulic crawler cranes. |
| 1981 |
日立：株式会社多田野鉄工所とトラッククレーン、クローラクレーンに関する業務提携。 |
| 1981 |
1981 : HCM : Formed a business tie-up with Tadano, Ltd. in the area of truck-mounted cranes and crawler cranes. |
| 1985 |
住友：深：国際建設機械有限公司（中国）設立。 |
| 1985 |
1985 : SHI : Shenzhen International Construction Machinery Corp. (China) established. |
| 1986 |
住友：住友とFMC社との合弁会社LBCE社（米国）を設立。北米にてクレーンの販売開始。住友重機械工業（株）より分離独立。製販一体の新会社、住友建機（株）設立。 |
| 1986 |
1986 : SHI : Sumitomo and FMC established the joint venture company LBCE (USA). The company began sales of cranes in the US. : By way of a corporate spin-off from Sumitomo Heavy Industries, Sumitomo Construction Machinery was established as a vertically integrated company from manufacture to sales. |
| 1986 |
住友：住友とFMC社との合弁会社LBCE社（米国）を設立。北米にてクレーンの販売開始。住友重機械工業（株）より分離独立。製販一体の新会社、住友建機（株）設立。 |
| 1986 |
1986 : SHI : Sumitomo and FMC established the joint venture company LBCE (USA). The company began sales of cranes in the US. : By way of a corporate spin-off from Sumitomo Heavy Industries, Sumitomo Construction Machinery was established as a vertically integrated company from manufacture to sales. |
| 1989 |
日立：土浦工場近隣に減速機等を量産する霞ヶ浦工場竣工。東京証券取引所市場第一部に株式を上場。 |
| 1989 |
1989 : HCM : The Kasumigaura plant, a factory for mass producing transmission and other components, was completed in the vicinity of the Tsuchiura plant. : The company was listed in the first section of the Tokyo Stock Exchange. |
| 1990 |
住友：オールテレーンクレーン（全油圧式トラッククレーン）生産開始。 |
| 1990 |
1990 : SHI : Production begun of an all-terrain crane (fully hydraulic truck-mounted crane). |
| 1994 |
日立：KHシリーズをフルモデルチェンジしたCXシリーズを市場導入。 |
| 1994 |
1994 : HCM : The CX series, a fully remodeled version of the KH series, was launched. |
| 1996 |
日立：土浦事業本部がISO9001認証取得。 |
| 1996 |
1996 : HCM : The Tsuchiura business division acquired ISO9001 certification. |
| 1997 |
日立：環境マネジメントシステムISO14001認証取得。 |
| 1997 |
1997 : HCM : The company acquired ISO14001 certification for environmental management systems. |
| 1997 |
日立：環境マネジメントシステムISO14001認証取得。 |
| 1998 |
住友：クレーン・基礎機械の製造で品質保証の国際規格、ISO9001認証取得。 |
| 1998 |
1998 : SHI : The company acquired ISO9001 certification, an international standard for quality assurance, for its manufacture of cranes and foundation work equipment. |
| 1998 |
住友：クレーン・基礎機械の製造で品質保証の国際規格、ISO9001認証取得。 |
| 1998 |
1998 : SHI : The Nagoya plant acquired ISO9001 certification for environmental management systems. |
| 1999 |
住友：環境マネジメントシステム規格ISO14001を名古屋工場認証取得。 |
| 1999 |
1999 : SHI : The Nagoya plant acquired ISO14001 certification for environmental management systems. |
| 2000 |
住友：整備・レンタル専業のテクニカルクレーンサービス（株）を設立。 |
| 2000 |
2000 : SHI : Technical Crane Service Co., Ltd. (later called HSC Crane Services Co., Ltd.) established, specializing in crane maintenance and rental services. |
| 2001 |
日立：株式会社タダノとクレーン事業についての業務提携。 |
| 2001 |
2001 : HCM : Sumitomo Heavy Industries Co., Ltd. formed an alliance with Tadano Ltd. in the crane business. : SHI : Sumitomo Heavy Construction Crane was established as a corporate spin-off from Sumitomo Construction Machinery. : Sumitomo Heavy Industries formed an alliance in the crane business with Hitachi Construction Machinery Co., Ltd. and Tadano Ltd. |
| 2002 |
日立住友重機械建機クレーン（株）事業開始。 |
| 2002 |
2002 : Hitachi Sumitomo Heavy Industries Construction Crane Co., Ltd. opened for business. |
| 2003 |
日立：上海代表処を開設。SCXシリーズを市場導入。SCX900-2、SCX1200-2の2機種を販売開始。 |
| 2003 |
2003 : The Shanghai representative office was opened. : The SCX series was launched. Sales of two models, the SCX900-2 and SCX1200-2, begun. : Technical Crane Services Co., Ltd. [later called HSC Crane Services Co., Ltd.] was consolidated into the group. |
| 2003 |
2003 : The Shanghai representative office was opened. : The SCX series was launched. Sales of two models, the SCX900-2 and SCX1200-2, begun. : Technical Crane Services Co., Ltd. [later called HSC Crane Services Co., Ltd.] was consolidated into the group. |
| 2004 |
日立：製造本部名古屋工場を新設。 |
| 2004 |
2004 : Hitachi Sumitomo Heavy Industries Construction Crane (Shanghai) Co., Ltd. established. : The manufacturing division opened its Nagoya plant. |
| 2004 |
2004 : Hitachi Sumitomo Heavy Industries Construction Crane (Shanghai) Co., Ltd. established. : The manufacturing division opened its Nagoya plant. |
| 2005 |
住友：ホイールクレーンUCX300を販売開始。オールテレーンクレーンATXシリーズを販売開始。 |
| 2005 |
2005 : UCX300, a wheeled crane, was launched. : The ATX series, all-terrain cranes, was launched. |
| 2005 |
住友：ホイールクレーンUCX300を販売開始。オールテレーンクレーンATXシリーズを販売開始。 |
| 2006 |
住友：HSCクレーンサービス株式会社を合併。 |
| 2006 |
2006 : HSC Crane Services was merged into HSC. |
| 2006 |
住友：HSCクレーンサービス株式会社を合併。 |
| 2007 |
住友：中期経営計画「グローバル HSC 21C」を策定。 |
| 2007 |
2007 : Midterm management plan "Global HSC 21C" was prepared. |
| 2007 |
2007 : Midterm management plan 'Global HSC 21C' was prepared. |
| 2008 |
住友：SCX2000-2が機械工業デザイン賞「審査委員会特別賞」を受賞。 |
| 2008 |
2008 : SCX2000-2 won the Machine Design Award: Distinctive Merit Prize. |
| 2010 |
住友：6000SLXが機械工業デザイン賞「日本力（にっぽんぶらんど）賞」を受賞。 |
| 2010 |
2010 : 6000SLX won the Machine Design Award: Nippon Brand Prize. |
| 2011 |
住友：中期経営計画「再起2013」を策定。 |
| 2011 |
2011 : Midterm management plan "Rebirth 2013" was prepared. |
| 2011 |
2011 : Midterm management plan 'Rebirth 2013' was prepared. |
| 2012 |
住友：創立10周年を迎え、デザインを一新したSCX-3シリーズを販売開始。 |
| 2012 |
2012 : On occasion of our tenth anniversary, the redesigned SCX-3 series was launched. |
| 2012 |
住友：デザインを一新したSCX-3シリーズを販売開始。 |
| 2013 |
住友：SCX1200-3が機械工業デザイン賞「審査委員会特別賞」を受賞。 |
| 2013 |
2013 : SCX1200-3 won the Machine Design Award: Distinctive Merit Prize. |
| 2014 |
住友：中期経営計画「躍進2016」を策定。 |
| 2014 |
2014 : Midterm management plan "Breakthrough 2016" was prepared. |
| 2014 |
2014 : Midterm management plan 'Breakthrough 2016' was prepared. |
| 2016 |
住友：テレスコピックブームシリーズ「650TLX」「SDX612」が機械工業デザイン賞「日本力（にっぽんぶらんど）賞」を受賞。 |
| 2016 |
2016 : The 650TLX and SDX612 series of crawler cranes with telescopic booms won the Machine Design Award: Nippon Brand Prize. |
| 2017 |
住友：中期経営計画「翔2019 for the Next Stage 2019」を策定。 |
| 2017 |
2017 : Midterm management plan "for the Next Stage 2019" was prepared. : The SCX3500-3 model won the Machine Design Award: Grand Prize (Minister of Economy, Trade and Industry Award). : HSC Shares was transferred between parent companies. |
| 2017 |
住友：中期経営計画「翔2019 for the Next Stage 2019」を策定。SCX3500-3が機械工業デザイン賞「最優秀賞(経済産業大臣賞)」を受賞。 |
| 2017 |
2017 : Midterm management plan 'for the Next Stage 2019' was prepared. : The SCX3500-3 model won the Machine Design Award: Grand Prize (Minister of Economy, Trade and Industry Award). : HSC Shares was transferred between parent companies. |
| 2018 |
住友重機械建機クレーン株式会社に社名変更。新ブランドHSC CRANESを立ち上げ。 |
| 2018 |
クローラクレーンSCX-3シリーズが「2018年度グッドデザイン賞」を受賞。 |
| 2018 |
2018 : Changed name to Sumitomo Heavy Industries Construction Cranes Co., Ltd. : "HSC CRANES" as new brand mark was launched. : The Crawler Crane SCX-3 Series was winner of the GOOD DESIGN AWARD 2018. |
| 2019 |
住友：欧州支店設立。 |
| 2019 |
2019 : Europe office was established. |
| 2022 |
住友重機械工業の100％子会社となる。 |
| 2022 |
2022 : Became wholly owned subsidiary of Sumitomo Heavy Industries, Ltd.. |
| 19775 |
住友：油圧式トラッククレーン販売開始。 |
