On 7 May 1946, after the end of World War 2, Masaru Ibuka started a radio repair shop in a bomb-damaged Shirokiya department store building in the Nihonbashi district of Tokyo. The next year, he was joined by his colleague, Akio Morita, and they founded a company called Tokyo Tsushin Kogyo. The company built Japan's first tape recorder, called the Type-G. In the early 1950s, Ibuka traveled in the United States and heard about Bell Labs' invention of the transistor. He convinced Bell to license the transistor technology to his Japanese company. While most American companies were researching the transistor for its military applications, Ibuka and Morita looked to apply it to communications. Although the American companies Regency Electronics and Texas Instruments built the first transistor radio as joint venture, it was Ibuka's company that made them commercially successful for the first time.