| 1900 |
Founded in 1900 as "Ishihara Eiju-do" |
| 1900-04 |
Transitioned to Prime Market in 2022 |
| 1939 |
Established "Ishihara Eiju-do Co., Ltd." in 1939 |
| 1939-03 |
Founded individual Ishihara Eiju-do in Hyogo-ku, Kobe City, and started wholesale and retail of pharmaceuticals and industrial chemicals |
| 1939-03 |
株式会社に改組し、株式会社石原永壽堂を設立。 |
| 1946 |
Changed trade name to "Ishihara Pharmaceutical Co., Ltd." in 1946 |
| 1946-03 |
Reorganized into a corporation and established Ishihara Eiju-do Co., Ltd. in March 1939 |
| 1946-03 |
石原薬品株式会社に商号を変更。 |
| 1953 |
Developed liquid gloss agent and started manufacturing and sales of "Unicon" for musical instruments and furniture in 1953 |
| 1953-09 |
Changed trade name to "Ishihara Pharmaceutical Co., Ltd." in March 1946 |
| 1953-09 |
米国ゼネラルエレクトリック社及びダウコーニング社よりシリコーンを輸入 : 液状つや出し剤を開発し、楽器・家具用液状つや出し剤「ユニコン」の製造販売を開始。 |
| 1955-04 |
Imported silicone from General Electric and Dow Corning in 1953, developed liquid gloss agent, and started manufacturing and sales of "Unicon" for musical instruments and furniture |
| 1955-04 |
工業用無機化合物及び塩類、金属洗浄剤、活性炭などの販売を開始。 |
| 1958 |
Established Tokyo branch (later upgraded to Tokyo Sales Office) in Chiyoda, Tokyo in 1958 |
| 1959 |
Started manufacturing and sales of Japan's first cream-type automotive gloss agent "Unicon Car Cream" in 1959 |
| 1959-04 |
Started sales of inorganic compounds, salts, metal cleaning agents, and activated carbon in April 1955 |
| 1959-04 |
国産初のクリーム状自動車用つや出し剤「ユニコン カークリーム」の製造販売を開始。 |
| 1963-06 |
Started manufacturing and sales of Japan's first cream-type automotive gloss agent "Unicon Car Cream" in April 1959 |
| 1963-06 |
溶接スパッター付着防止剤「ユニコン ノンスパッター」の製造販売を開始。 |
| 1964 |
Started manufacturing and sales of "Unicon TINBRIGHT" for glossy tin plating and soldering in 1964 |
| 1964-01 |
Started manufacturing and sales of "Unicon Nonspatter" anti-spatter agent for welding in June 1963 |
| 1964-01 |
光沢スズめっき、光沢はんだめっき用添加剤「ユニコン ティンブライト」の製造販売を開始。 |
| 1966 |
Started manufacturing and sales of automotive coating repair compounds in 1966 |
| 1966-03 |
Started manufacturing and sales of "Unicon Tinbright" for glossy tin plating and soldering in January 1964 |
| 1966-03 |
自動車用塗装補修コンパウンドの製造販売を開始。 |
| 1977 |
Formed sales partnership with US Corning Glass Works (now Corning Incorporated) and started importing and processing machinable ceramics "Makool" in 1977 |
| 1977 |
昭和52（1977）年、米国コーニング・グラスワークス社と販売提携をし、マシナブルセラミック「マコール」の輸入、加工販売を開始 |
| 1977-03 |
Started manufacturing and sales of automotive coating repair compounds in March 1966 |
| 1977-03 |
米国コーニング・グラスワークス社(現コーニングインコーポレイテッド)と販売提携 : マシナブルセラミック「マコール」の輸入、加工販売を開始。 |
| 1978 |
Moved headquarters manufacturing division to Takashima City, Shiga Prefecture, and established Shiga Factory in 1978 |
| 1981-03 |
Formed sales partnership with Corning Glass Works and started importing and processing machinable ceramics "Makool" in March 1977 |
| 1981-03 |
コンピューター搭載のめっき液自動管理装置の製造販売を開始。 |
| 1982 |
Received the "Metal Surface Technology Award" from the Japan Metal Surface Technology Association for the automatic management device for plating solutions in 1982 |
| 1982-05 |
Started manufacturing and sales of computer-controlled plating solution automatic management devices in March 1981 |
| 1982-05 |
門型洗車機用洗浄剤及びワックスの製造販売を開始。 |
| 1990-04 |
Started manufacturing and sales of gate-type car wash agents and waxes in May 1982 |
| 1990-04 |
無電解スズめっき液「ユニコン 無電解スズ５８０M」の製造販売を開始。 |
| 1991 |
Listed on the Second Section of the Tokyo Stock Exchange in 1991 |
| 1991-11 |
Started manufacturing and sales of electroless tin plating solution "Unicon Electroless Tin 580M" in April 1990 |
| 1991-11 |
大阪証券取引所市場第二部特別指定銘柄に上場。 |
| 1994-09 |
Listed on the Osaka Securities Exchange Second Section in September 1991 |
| 1994-09 |
大阪証券取引所市場第二部特別指定銘柄の指定解除。 |
| 1999 |
Started manufacturing and sales of environmentally friendly lead-free soldering agents and obtained ISO9001 certification in 1999 |
| 1999-09 |
Removed designation as a specially designated stock in September 1994 |
| 1999-09 |
ISO9001番を認証取得。 |
| 1999-10 |
Obtained ISO9001 certification in September 1999 |
| 1999-10 |
環境に配慮した鉛フリーはんだめっき液の製造・販売を開始。 |
| 2002 |
Started manufacturing and sales of automotive air conditioner cleaning agents in 2002 |
| 2002-01 |
Started manufacturing and sales of environmentally friendly lead-free soldering agents in October 1999 |
| 2002-01 |
自動車エアコン洗浄剤の製造販売を開始。 |
| 2003 |
Started manufacturing and sales of wafer bump plating solutions in 2003 |
| 2003 |
平成15（2003）年、ウエハーバンプめっき液の製造販売を開始。同年、ISO14001審査登録 |
| 2003-03 |
Started manufacturing and sales of automotive air conditioner cleaning agents in January 2002 |
| 2003-03 |
ウエハーバンプ向けめっき液の製造販売を開始。 |
| 2003-09 |
Started manufacturing and sales of wafer bump plating solutions in March 2003 |
| 2003-09 |
ISO14001番を認証取得。 |
| 2004 |
Relocated Tokyo branch office to Taito, Tokyo in 2004 |
| 2005 |
Opened Shanghai Representative Office in China in 2005 |
| 2005-04 |
Obtained ISO14001 certification in September 2003 |
| 2005-04 |
上海駐在員事務所を開設。 |
| 2011 |
Listed on the Second Section of the Tokyo Stock Exchange in 2011 |
| 2011 |
平成23（2011）年、東証二部上場。同年、半導体ウエハー用電気銅めっき液の製造販売を開始 |
| 2011-03 |
Opened Shanghai Representative Office in March 2005 |
| 2011-03 |
東京証券取引所市場第二部に上場。 |
| 2011-04 |
Listed on the Second Section of the Tokyo Stock Exchange in March 2011 |
| 2011-04 |
半導体ウエハー用電気銅めっき液の製造販売を開始。 |
| 2012 |
Established a representative office in Bangkok, Thailand in 2012 |
| 2012-06 |
Started manufacturing and sales of copper electroplating solution for semiconductor wafers in April 2011 |
| 2012-06 |
タイ駐在員事務所を開設。 |
| 2013 |
Established Kobe Factory in Nishinomiya, Kobe, and relocated part of R&D department in 2013 |
| 2013 |
平成25（2013）年、神戸市西区に神戸工場を開設。同年、「石原ケミカル株式会社」に商号を変更 |
| 2013-04 |
Opened Thailand Representative Office in June 2012 |
| 2013-04 |
神戸ハイテクパーク（神戸市西区）に神戸工場を新設し、研究開発部門の一部を移転。 |
| 2013-10 |
Built new Kobe Factory in Kobe Tech Park and relocated part of R&D department in October 2013 |
| 2013-10 |
石原ケミカル株式会社に商号を変更。 |
| 2015 |
Changed trade name to "Ishihara Chemical Co., Ltd." in 2013 |
| 2015-08 |
Changed trade name to "Ishihara Chemical Co., Ltd." in October 2013 |
| 2015-08 |
中国上海に石原化美(上海)商貿有限公司を設立。 : (平成28年3月より営業を開始) |
| 2017-09 |
Increased capital to 1,980,870,000 yen in September 2017 |
| 2017-09 |
資本金198,087万円に増資。 |
| 2018 |
Established Ishihara Kabi (Shanghai) Trading Co., Ltd. in Shanghai, China in 2015 |
| 2018-03 |
Listed on the First Section of the Tokyo Stock Exchange in March 2018 |
| 2018-03 |
東京証券取引所市場第一部に上場。 |
| 2019 |
Listed on the First Section of the Tokyo Stock Exchange in 2018 |
| 2019-10 |
Made Kizai Co., Ltd. a wholly owned subsidiary in October 2019 |
| 2019-10 |
キザイ株式会社を完全子会社化。 |
| 2021 |
Made Kizai Co., Ltd. a wholly owned subsidiary in 2019 |
| 2021-01 |
Established Taiwan Branch in January 2021 |
| 2021-01 |
台湾支店を開設。 : (2021年4月より営業を開始) |
| 2022 |
Opened Taiwan Branch in 2021 |
| 2022-04 |
Transitioned to Prime Market in April 2022 |
| 2022-04 |
東京証券取引所プライム市場へ移行。 |
| 2025-09 |
Established Ishihara Kabi (Shanghai) Technology Co., Ltd. in Shanghai, China in September 2025 |
| 2025-09 |
中国上海に石原化美（上海）科技有限公司を設立。 |
