 Complete the following phrase:  Sultan Ibrahim became a personal friend of Tokugawa Yoshichika during the 1920s. Tokugawa was a scion of the Tokugawa clan, and his ancestors were military leaders shōgun in Japanese who ruled Japan from the 16th to the 19th centuries. When the Japanese invaded Malaya, Tokugawa accompanied General Yamashita Tomoyukis troops and was warmly received by Sultan Ibrahim when they reached Johor Bahru at the end of January 1942. Yamashita and his officers then stationed themselves at the Sultans residence, Istana Bukit Serene and the state secretariat building, Sultan Ibrahim Building to plan for the 