When the Japanese invaded Malaya, Tokugawa accompanied General Yamashita Tomoyuki's troops and was warmly received by Sultan Ibrahim when they reached Johor Bahru at the end of January 1942.
Saat Jepang menginvasi Malaya, Tokugawa disertai dengan pasukan pimpinan Jenderal Yamashita Tomoyuki dan disambut hangat oleh Sultan Ibrahim saat mereka mencapai Johor Bahru pada akhir Januari 1942.