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1924-1969 1970-1999 2000-
| 1924 | The company was founded at Hanaten-town, Higashinari-County, Osaka, under the name of “Tsurumi Shokai”, and started manufacturing TDL-series agriculture-use vertical shaft pumps. |
| 1951 | It was incorporated as a limited company, “Tsurumi Manufacturing Company, Limited”. Developed 2-stage vertical shaft pumps (TDW-series) for construction dewatering use and launched to the market. |
| 1953 to 1954 | Developed the first “submersible” pump series, EP-series (EP-75 and EP-100) |
| Pump models sold in 1955 to 1959 | The first submersible pump EP-series |
| 1960 | Opened Osaka Sales Office and Tokyo Sales Office (currently Kinki Branch Office and Tokyo Branch Office) |
| 1962 | Developed new, light-weight, dry-type motors to replace conventional oil-filled motor A KB-series pump incorporating a dry-type motor |
| 1964 to 1965 | Developed a new submersible pump with a built-in circle thermal protector for the first time in the industry The KR-model launched in January, 1965 |
| 1965 | Opened Sapporo Sales Office (currently Hokkaido Branch Office) |
| 1966 | Opened Fukuoka Sales Office (currently Kyushu Branch Office) |
| 1967 | Opened Niigata Sales Office (currently Niigata Branch Office) |
| 1968 | TB-model, the Tsurumi’s first float-type submersible automatic pump with a built-in automatic control circuit (150W) |
| 1969 | Opened Nagoya and Hokuriku Sales Office (currently Chubu and Hokuriku Branch Office) Factory for small-sized pumps and automatic painting system  |
