The Head office and the Osaka Factory at the time of establishment

In order to specialize in management, the Osaka division of Daihatsu Motor Co., Ltd. was separated and a new company, "Daihatsu Diesel Mfg. Co., Ltd.," was established.

The company began with capital of 1 billion yen, 930 employees, and first year sales of 7.3 billion yen, with 75% of the sales being diesel engines and other internal combustion engines, as well as the manufacture and sale of other vehicle equipment, door equipment, construction machinery, etc.

Moriyama First Factory

The gradual streamlining of the head office factory was no longer able to keep up with the increased production, and because it was located in a densely populated urban area, there were problems with noise pollution, so the only solution to increase production was to build a new factory in a new location.

The construction (located in Moriyama Town, Shiga Prefecture, now Moriyama City) was carried out under three clear policies: "To improve quality and create a modern, highly productive factory," "Because it was being built in a rural environment, to make it a model non-polluting factory," and "To value relations with the local community." The first phase of construction was completed in November 1969, with the second phase starting in 1971 and the third phase in 1973, and the Moriyama First Factory was almost complete by June 1977

In 1979, the Moriyama Second Factory was completed and started operation. Then, over the course of a year from September 1981 to October of the following year, factory consolidation from the Osaka Factory to the Moriyama Factory was completed.

Shin-Umeda City

As development plans progressed for the area, which combined the site of the former Osaka Factory sold to Sekisui House Ltd. with the adjacent sites of Toshiba Corporation and Aoki Construction, our company decided to participate in the project and construction began in March 1990.

It was named Shin-Umeda City and completed in the spring of 1993.

It was the construction of a truly groundbreaking urban space. Due to participation in this project, the head office was relocated to Tokui-cho, Chuo-ku, Osaka in September 1990.

The company's quality control system began with a company-wide QC/ZD campaign at the same time as the company was established. The acquisition of the following official quality control certifications proceeded as follows:

ISO 9001 Certification

Then in January 1994, our head office and Moriyama factory obtained ISO 9001 (International Organization for Standardization: quality system standard) certification from LRQA.

The company has been working on the development of environmentally friendly engines and environmentally related products, and have commercialized an ultra-low NOx gas turbine for regular use as well as a new type of food waste treatment device (product name: Kando Batsugun) that uses the first NON-Bacteria System (organic matter decomposition without using bacteria) as an environmentally related product in Japan, and entered the environmental business field.

Furthermore, Moriyama Factory obtained ISO 14001 certification.

ISO 14001 Certification

Ultra-low NOx gas turbine

Food waste treatment equipment

Umeda Sky Building

The head office was relocated to Umeda Sky Building Tower West, 1-1-30 Oyodonaka, Kita-ku, Osaka, the birthplace of Hatsudoki Seizo Co., Ltd., and began operations on July 19, 2005.
In 1990, with the construction of Shin Umeda City, the company moved its Head office to Tokui-cho, Chuo-ku, Osaka, and its long-held dream was finally achieved.

R&D Center

On May 26, 2008, we completed construction of our R&D Center.​

This center was built to utilize the experience and ingenuity of the engineers in the development of products for the next generation.

6DK-20e engine compliant with Tier 2 NOx regulations

The company shipped the first unit, the 6DK-20e (720 rpm, 670 kW) to comply with the International Maritime Organization's (IMO) Tier 2 NOx regulations, which will be applied to ships built after January 2011.

This Tier 2 regulation compliant engine has been named "e-Diesel," and clears the strict Tier 2 regulations by optimizing the compression ratio, valve timing, high-pressure turbocharger, fuel injection timing, combustion chamber, and fuel injection valves without compromising safety, reliability, or durability. In addition to general performance including fuel efficiency, this engine has been properly tuned to ensure low-load combustion even with low-quality fuel oil and to prevent deterioration of instantaneous speed fluctuation, making it a safe and reliable engine.

NOx inspection tests have already been conducted in the presence of Nippon Kaiji Kyokai (NK) as well as the classification societies ABS, BV, CCS, DNV, KR and LR, and certificates have been issued for it.