Tsurigane Ironworks was founded. Began production and sales of TORO BRAND cast iron pipe fittings and drainage fittings.

Resumed production of drainage fittings for TORO BRAND as Ikuno Factory.

Osaka Ikuno Factory was newly built, and at the same time, the company was reorganized as a corporation and renamed Osaka Drainage Industry Co.

Drainage fitting was designated by the Ministry of Construction. Listed in the National Common Specification List.

At the same time as the establishment of the Japan Housing Corporation, our company received designation of drainage equipment and drainage fittings for each branch office nationwide.

Established a casting factory in Tatsumi Daichi-cho, Ikuno-ward, Osaka-city.

Installed a dedicated machine (tapping machine) for threading drainage fittings. At the same time, the company switched from water pressure testing equipment to barometric pressure testing equipment in order to increase production.

Opened Tokyo Sales Office.

Designated by Nippon Telegraph and Telephone Public Corporation, Japan National Railways, Ministry of Posts and Telecommunications, Ministry of Education, and Defense Agency. During this period, our company was designated by prefectures and cities nationwide.

"JIS B 2303 Threaded drainage pipe fittings" was enacted.

Switched drainage joints from conventional "HASS standard" to "JIS standard".

Received approval for threaded drain pipe fitting (made of cast metal) from the Minister of International Trade and Industry as a Japan Industrial Standard Display Authorized Factory first in Japan.

Separated the casting factory

Newly Established Nara factory in Tawaramoto-cho, Shiki District, Nara Prefecture.

Started manufacturing and sales of MD joint, a flexible joint for drainage pipes, at the same time as the standard was enacted.

Received product designation for drainage fittings, valve casings, and lids (cast iron) from the Ministry of Construction, Tohoku Regional Construction Bureau, Kyushu Regional Construction Bureau, and Hokkaido Development Bureau. As well, received additional product designation for valve casing and lid from the Chugoku Regional Construction Bureau.

Received product designation drainage fittings, valve casings and lids (cast iron) from the Kanto Regional Construction Bureau.

Established Odik Corporation.

Established Head Office and relocated Osaka Sales Office.

The company name was changed to DAIDORE CORPORATION.

Established DAIDORE LOGISTICS Ltd.

Obtained ISO 9001 certification, an international quality system standard.

Merged with Odik Corporation.

Joined the CREATE Group.

Established Daipoly System Corporation.

Merged with Crit Corporation.

Newly established dedicated factory for Daipoly system product at the site near the Nara factory.

Newly established Daipoly System Sano Factory.

Tosk Remake Cover Received special award at the Building Materials and Housing Equipment Exhibition.

Tosk Remake Cover is certified as Osaka's top runner development project.

Tosk Remake Cover is registered in NETIS.

Products for sewerage received certification from the Japan Sewage Works Association.

Obtained patent for "Tosk Remake Cover", a stainless steel water-permeable cosmetic cover.