
Despite the death of Kibataro Oki, Oki Electric continued to grow. Following the outbreak of the First World War, overseas orders increased substantially.

OKI and Co. Ltd increased in capital to 700,000 yen.
OKI and Co. continued to grow and recapitalize, this time to 1 million yen. As the company's operations expanded, so did its workforce: from 381 employees in 1907 to 772 in 1912.
OKI produced 9,250 portable telephones for Russia.
Having decided to pursue a policy of business expansion OKI focused on five product areas:
Oki Electric purchased a plant in the Osaki section of Tokyo, refurbished it and named it the Osaki Plant.