• 

  Koei Sangyo

• 

  Oei

• 

  TOEI condenser

• 

  TOEI Electric

• 

  Kyoei Denshi

• 

  KOEI SPRING

• 

  KYOEI SEIKO

• 

  NIKKISO EIKO

• 

  TOEI ELECTRIC CO. LTD

• 

  Kyoei Electric Co., Ltd.