| 1949.
3 |
Tokyo Roki
Co., Ltd. was established (at Denen-chofu, Ota-ku, Tokyo)
to start the commercial business of manufacturing and selling
the air cleaners and oil filters for internal combustion engines.
1952. 4 The engineering department was organized to start
developing the filter papers. |
| 1955.
6 |
The headquarters
building and Kawasaki Plant were completed at Ichinotsubo,
Kawasaki-shi, and we then moved into there. 1958. 2 Our various
filters for airplanes have passed through the approval tests
by the Self-defense Agency of Japan. |
| 1960.
4 |
Manufacturing
the mufflers for internal combustion engines was started. |
| 1961.
1 |
The town
offices were opened at Nagoya, Osaka and Hiroshima, respectively. |
| 1962.
9 |
The IBM/PCS
was introduced into the company to start the computer-processing
of the office jobs. |
| 1964.
5 |
Yokohama
Plant was completed; the systems of manufacturing the elements
were established; and the platinum-catalyst purging mufflers
for diesel engines were developed. |
| 1965.10 |
The nationwide
8 office systems were established. |
| 1966.
9 |
Yokohama
Plant started the commercial production of "throw-away type
cartridge filters," a new product then. |
| 1966.12 |
Kusatsu
Plant was completed (in Shiga-ken) to start the commercial
production of air cleaners. |
| 1967.
7 |
The demonstration
running tests with actual vehicles of exhaust-gas purging
mufflers were started. |
| 1969.
4 |
Hiroshima
Plant was completed (in Hiroshima-ken) to start manufacturing
the air cleaners. |
| 1971.
4 |
Sagami
Plant was completed to start manufacturing the oil coolers. |
| 1972.
4 |
The Tokyo
Roki technical center was opened, resulting in being proud
of the biggest scale in the filter-related research centers
in Japan. |
| 1974.10 |
Hamamatsu
Plant was completed and the mass-production systems of cartridge
filters were established therein. |
| 1976.
3 |
Otsuki
Plant was completed (in Yamanashi-ken) to start manufacturing
the air cleaners. |
| 1976.11 |
The toner
filter elements for dry reproducing machines were developed. |
| 1979.11 |
The headquarters
was moved to a new headquarters building at Shin-yokohama
(in Yokohama-shi). |
| 1984.
3 |
The technical
center was moved into the headquarters building. |
| 1984.
4 |
Yokohama
Plant was opened, making it a center for developing the special
equipment and products. |
| 1985.
6 |
The systems
of analyzing the information via computers were introduced. |
| 1992.
4 |
The TIS
(Integrated Whole-company On-line Network Systems) started
the full-scale operations. |
| 1995.
8 |
The new
headquarters and research center were completed (at Tsuzuki-ku,
Yokohama-shi), to where moved from Shin-yokohama. |
| 1996.
8 |
New Sagami
Plant and the Sagami research center were completed (at Tana,
Sagamihara-shi). |
| 1997.
1 |
New Sagami
Plant (at Tana, Sagamihara-shi) started the full-scale commercial
operations |
| 2001.1 |
New Sagami
the second plant(at Tana,Sagamihara-shi) was completed to
start manufacturing plastic intake manifold. |
| 2001.2 |
Unicat,inc
was established. |
| 2005.4 |
Hiroshima
Plant was established. |
| 2006.8 |
Tokyo Roki
(Suzhou) Co.,Ltd. was completed(at Suzhou, CHINA). |
| 2008.5 |
New Sagami
the third plant(at Tanashioda, Sagamihara-shi) was completed. |
| 2010.11 |
Tokyo Roki
(Thailand) Co.,Ltd. is launched. |
