California-Japan Sister City Relationships - Listed by Year Incorporated State Prefecture Signing Date California Osaka November 15, 1994 City (California) City/Town/Village (Japan) Prefecture Signing Year Consulate Jurisdiction Current CJSCN Region San Jose Okayama City Okayama 1957 San Francisco Silicon Valley & South San Francisco Osaka City Osaka 1957 San Francisco Peninsula Pasadena Mishima Shizuoka 1957 Los Angeles Southern California Riverside Sendai Miyagi 1957 Los Angeles Southern California San Diego Yokohama Kanagawa 1957 Los Angeles Southern California Stockton Shizuoka City Shizuoka 1959 San Francisco Central Valley Los Angeles Nagoya Aichi 1959 Los Angeles Southern California San Bernardino Tachikawa Tokyo 1959 Los Angeles Southern California Glendale Higashi Osaka Osaka 1960 Los Angeles Southern California Lodi Kofu City Yamanashi 1961 San Francisco Central Valley Bakersfield Wakayama City Wakayama 1961 San Francisco Central Valley Richmond Shimada City Shizuoka 1961 San Francisco East Bay Montebello Ashiya Hyogo 1961 Los Angeles Southern California Oakland Fukuoka City Fukuoka 1962 San Francisco East Bay Gardena Ichikawa Chiba 1962 Los Angeles Southern California San Mateo Toyonaka City Osaka 1963 San Francisco Peninsula Long Beach Yokkaichi Mie 1963 Los Angeles Southern California Redlands Hino Tokyo 1963 Los Angeles Southern California Fresno Kochi City Kochi 1965 San Francisco Central Valley Delano Arida City Wakayama 1965 San Francisco Central Valley Culver City Kaizuka Osaka 1965 Los Angeles Southern California Visalia Miki City Hyogo 1966 San Francisco Central Valley Santa Barbara Toba Mie 1966 Los Angeles Southern California Antioch Chichibu City Saitama 1967 San Francisco East Bay Berkeley Sakai City Osaka 1967 San Francisco East Bay Vallejo Akashi City Hyogo 1968 San Francisco East Bay Monterey Park Nachikatsuura Wakayama 1968 Los Angeles Southern California Palm Springs Nikko Tochigi 1969 Los Angeles Southern California Fairfield Nirasaki City Yamanashi 1971 San Francisco East Bay Napa Iwanuma City Miyagi 1973 San Francisco North Bay Lindsay Ono City Hyogo 1973 San Francisco Central Valley Torrance Kashiwa Chiba 1973 Los Angeles Southern California Concord Kitakami City Iwate 1974 San Francisco East Bay Santa Cruz Shingu City Wakayama 1974 San Francisco Silicon Valley & South Hemet Kushimoto Wakayama 1974 Los Angeles Southern California El Dorado County Warabi City Saitama 1975 San Francisco Central Valley Santa Monica Fujinomiya Shizuoka 1975 Los Angeles Southern California Mountain View Iwata City Shizuoka 1976 San Francisco Silicon Valley & South Anaheim Mito Ibaraki 1976 Los Angeles Southern California Livermore Yotsukaido City Chiba 1977 San Francisco East Bay Cupertino Toyokawa City Aichi 1978 San Francisco Silicon Valley & South Salinas Ichiki Kushikino City Kagoshima 1979 San Francisco Silicon Valley & South Carson Soka Saitama 1979 Los Angeles Southern California Fremont Fukaya City Saitama 1980 San Francisco East Bay Mendocino Omachi City Nagano 1980 San Francisco North Bay Sacramento Matsuyama City Ehime 1981 San Francisco Central Valley Porterville Hamamatsu City Shizuoka 1981 San Francisco Central Valley Hercules Tsushima City Aichi 1981 San Francisco East Bay Brea Hanno Saitama 1981 Los Angeles Southern California Chula Vista Odawara Kanagawa 1981 Los Angeles Southern California La Mirada Isehara Kanagawa 1981 Los Angeles Southern California Lomita Takaishi Osaka 1981 Los Angeles Southern California Huntington Beach Anjo Aichi 1982 Los Angeles Southern California Rohnert Park Hashimoto City Wakayama 1983 San Francisco North Bay Saratoga Muko City Kyoto 1984 San Francisco Silicon Valley & South Burbank Ota Gunma 1984 Los Angeles Southern California Newport Beach Okazaki Aichi 1984 Los Angeles Southern California Sebastopol Takeo City Saga 1985 San Francisco North Bay Kerman Kannami Town Shizuoka 1985 San Francisco Central Valley Santa Clara Izumo City Shimane 1986 San Francisco Silicon Valley & South Hayward Funabashi City Chiba 1986 San Francisco East Bay Sausalito Sakaide City Kagawa 1988 San Francisco North Bay Gilroy Takko Town Aomori 1988 San Francisco Silicon Valley & South Watsonville Kawakami Village Nagano 1988 San Francisco Silicon Valley & South Carlsbad Futtsu Chiba 1988 Los Angeles Southern California Encinitas Amakusa Kumamoto 1988 Los Angeles Southern California Glendora Moka Tochigi 1988 Los Angeles Southern California Tracy Memuro Town Hokkaido 1989 San Francisco Central Valley Scotts Valley Nichinan Town Tottori 1989 San Francisco Silicon Valley & South Hollister Kato City Hyogo 1989 San Francisco Silicon Valley & South Yuba City Toride City Ibaraki 1989 San Francisco Central Valley Fullerton Fukui Fukui 1989 Los Angeles Southern California Irvine Tsukuba Ibaraki 1989 Los Angeles Southern California San Bruno Narita City Chiba 1990 San Francisco Peninsula Hemet Marumori Miyagi 1990 Los Angeles Southern California Oceanside Kisarazu Chiba 1990 Los Angeles Southern California Hanford Setana Town Hokkaido 1991 San Francisco Central Valley Eureka Kamisu City Ibaraki 1991 San Francisco North Bay Oceanside Fuji Shizuoka 1991 Los Angeles Southern California Modesto Kurume City Fukuoka 1992 San Francisco Central Valley South San Francisco Kishiwada City Osaka 1992 San Francisco Peninsula Escondido Itoshima Fukuoka 1993 Los Angeles Southern California Pasadena Kasukabe Saitama 1993 Los Angeles Southern California Livingston Oga City Akita 1994 San Francisco Silicon Valley & South Temecula Daisen Tottori 1994 Los Angeles Southern California Half Moon Bay Kariwa Village Niigata 1995 San Francisco Peninsula Monterey Nanao City Ishikawa 1995 San Francisco Silicon Valley & South Milpitas Tsukuba City Ibaraki 1996 San Francisco Silicon Valley & South Salinas Wakuya Town Miyagi 1998 San Francisco Silicon Valley & South Pittsburg Shimonoseki City Yamaguchi 1998 San Francisco East Bay Sonora Kirishima City Kagoshima 2000 San Francisco Central Valley Davis Inuyama City Aichi 2001 San Francisco Central Valley Corona Gotsu Shimane 2004 Los Angeles Southern California West Covina Ohtawara Tochigi 2004 Los Angeles Southern California Fort Bragg Otsuchi Town Iwate 2005 San Francisco North Bay Morgan Hill Mizuho Town Tokyo 2006 San Francisco Silicon Valley & South Rio Vista Tobishima Village Aichi 2007 San Francisco East Bay Alhambra Kirishima Kagoshima 2007 Los Angeles Southern California Palo Alto Tsuchiura City Ibaraki 2009 San Francisco Silicon Valley & South San Carlos Omura City Nagasaki 2012 San Francisco Peninsula Sunnyvale Iizuka City Fukuoka 2013 San Francisco Silicon Valley & South Redondo Beach Itoman Okinawa 2013 Los Angeles Southern California Millbrae Hanyu City Saitama 2014 San Francisco Peninsula Menlo Park Bizen City Okayama 2015 San Francisco Peninsula Santa Monica Kizugawa Kyoto 2016 Los Angeles Southern California Walnut Creek Kita Ward Tokyo 2017 San Francisco East Bay Crescent City/Del Norte County Rikuzentakata City Iwate 2018 San Francisco North Bay Rancho Palos Verdes Sakura City Chiba 2020 Los Angeles Southern California Foster City Inagi Tokyo Pending Incorporation San Francisco Peninsula.