*Place the cursor over a photo to enlarge it.
- 1928December 1928
- Nippon Signal Co., Ltd established.
(Merger of Mimura Factory, Shiota Factory and Railway Signal Co., Ltd)
- 1931June 1931
- Traffic Signals domestically manufactured
and installed at Nihonbashi, Gofukubashi, and Sakurabashi intersections.
- 1937December 1937
- Yono Factory established in Urawa, Saitama (present-day Saitama).
- 1948April 1948
- Osaka Branch Office established.
- 1949May 1949
- Listed on the Tokyo Stock Exchange.
- 1954August 1954
- Vacuum tube-based B-type in-vehicle alarm systems introduced
in the Keihin-Tohoku Line and the Yamanote Line.
- 1958May 1958
- CTC system installed for use on the Ito Line.
First CTC system ever in the Japan National Railways. 
- 1962November 1962
- Utsunomiya Factory established.
- 1964October 1964
- CTC and ATC systems installed for use in the Tokaido Shinkansen Line
connecting Tokyo and Shin-Osaka Station.
- 1969October 1969
- Automatic ticket gate system installed for use in Tokyo Monorail.
- 1970October 1970
- Commencement of Production of Park-Lock systems.
- 1972April 1972
- Tochigi Prefecture Police Headquarters Traffic Control Center established;
Signal equipment adopted for use by the Traffic Control Center. 
- December 1972
- Japan’s first comprehensive AFC system installed
for use in lines of the Sapporo Municipal Subway.
- 1988October 1988
- A signal project agreement with Turkish State Railways concluded
(the first turnkey agreement with an overseas company). 
- 1995October 1995
- Nippon Signal awarded ISO9001 certification.
- 1998October 1998
- Nippon Signal exclusively receives an order for railway signal modernization
(introduction of CTC systems, electronic interlocking systems, etc.)
for all the islands of Taiwan.
- 2002July 2002
- Shutdown of Yono plant.
- December 2002
- Nippon Signal awarded ISO14001 certification.
- 2003December 2003
- AFC system installed for use in Line 13 of the Beijing Subway.
- 2004October 2004
- Taipei Office established in Taiwan.
- 2007January 2007
- Taiwan Shinkansen starts operation. Delivered Signaling systems.
- March 2007
- The interoperation of common IC cards (Suica and PASMO) starts;
Nippon Signal receives an order for simultaneous remodeling
of ticket gates and completes this project. 
- June 2007
- Head Office relocated to Shin-Marunouchi Building in Chiyoda, Tokyo.
- 2008January 2008
- Beijing Nippon Signal Co., Ltd. established (A local affiliated company in China).
- 2011December 2011
- SPARCS (simple-structure and high-performance ATC by radio communication system)
put into commercial operation in Line 15 of the Beijing Subway.
- 2016March 2016
- Completion of construction of Signalio Nanasato, a dormitory for bachelor employees.
- 2017October 2017
- ANSHIN (safety and reliability) Center established.
Completion of construction of Signalio Utsunomiya, a dormitory for bachelor employees. 
