Charles C. Dail Memorial Gate to the Japanese Friendship Garden. Dail was the Mayor of San Diego from 1955 to 1963. The garden is an expression of friendship between San Diego and its Sister City Yokohama, Japan. The 1915 Panama California Exposition included a Japanese Teahouse and garden, which remained until 1941. In 1955, a plan for restoring a Japanese garden was started. In 1968, the San Diego Yokohama Sister City Society acquired and dedicated the gate to show commitment. The new garden opened in 1999.