| Taiwan |
 Taiwan Secom Co., Ltd. |
| Korea |
S1 Corporation (Korea) |
| China |
Secom (China) Co., Ltd. |
| Dalian Secom Security Co., Ltd. |
| Shanghai Secom Security Co., Ltd. |
| Beijing Jingdun Secom Electronic Security Co., Ltd. |
| Qingdao Secom Security Co., Ltd. |
| Guangdong Jinpeng Secom Security Co., Ltd. |
| Fujian Secom Security Co., Ltd. |
| Shaanxi Secom Security Co.,Ltd. |
| Sichuan Secom Security Co.,Ltd. |
| Zhejiang Secom Security Co.,Ltd. |
| Liaoning Secom Security Co.,Ltd. |
| Secom (Tianjin) Electronic Security Tech-Engineering Co.,Ltd. |
| Tianjin Secom Property Management Co., Ltd. |
| Shanghai Nohmi Secom Fire Protection Equipment Co., Ltd. |
| Shanghai Guanlin Secom Intelligence Technology Co., Ltd. |
| Thailand |
Thaisecom Pitakkij Co., Ltd. |
| Malaysia |
Secom (Malaysia) Sdn. Bhd. |
| Singapore |
Secom (Singapore) Pte Ltd. |
| Indonesia |
PT. Secom Indonesia |
| PT. Nusantara Secom InfoTech (NSI) (Indonesia) |
| Vietnam |
Secom Vietnam Co.,Ltd. |
| the United Kingdom |
Secom Plc |
| Australia |
Secom Australia Pty. Ltd. |
| New Zealand |
Secom Guardall NZ Ltd. |
| the United States |
The Westec Security Group,Inc. |
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