| 1985 | July | First delegation from Kameoka to Stillwater |
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| November | First delegation from Stillwater to Kameoka |
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| | Formal Establishment of Sister City Relationship |
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| 1986 | October | Establishment of Stillwater Sister Cities Council |
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| | Planning for Stillwaterland and Kameoka Koen |
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| 1987 | November | Delegation from Kameoka visits Stillwater in commemoration of the Second Anniversary of the Sister City Relationship |
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| | Stillwater invited to participate in the World Exposition of Historic Cities in Kyoto |
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| 1988 | August | 6-member Educational Delegation from Kameoka visits Stillwater |
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| October | Mayor Mike Henson and Sister Cities Council members Sylvia Duncan and Carl Fox visit Kameoka to participate in Japan's National Sports Festival |
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| 1989 | April | Formal Sister School relationship established between Taisei Junior High School and Stillwater Middle School |
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| | Mayor Yoshihisa Taniguchi of Kameoka and his delegation visit Stillwater for the Centennial Celebration of Stillwater's Municipality |
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| July | Kameoka High School student Tsubasa Nakano selected as one of twelve worldwide winners in the Sister Cities International Young Artist Contest |
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| August | Members of Sister Cities Council attend the Sister Cities International Convention in Portland |
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| 1990 | January | Delegation from Taisei Junior High School visits Stillwater Middle School |
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| May | Plan to establish Oklahoma State University-Kyoto announced |
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| | Kameoka delegation visits Stillwater to attend the Centennial Commencement of OSU |
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| | Delegation from Stillwater and OSU visits Kameoka to attend the Opening Ceremony of OSU-K |
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| June | First class of OSU-K students arrive in Stillwater to study for one year at the English Language Institute-Kyoto |
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| July | Members of Sister Cities Council attend the Sister Cities International convention in Albuquerque, New Mexico |
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| October | Delegation from Stillwater Middle School visits Taisei Junior High School |
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| | Delegation from Stillwater visits Kameoka to attend the 5th Anniversary Celebration of the Sister City Relationship, Kameoka's 35th Anniversary of Municipality, and dedication of Kameoka's new city hall |
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| November | Parents of OSU-K students visit Stillwater |
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| 1991 | February | Cherry trees planted in Kameoka Koen and on the OSU-K campus by Stillwater and Kameoka Rotary Clubs |
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| March | Delegation of 7 adults and 23 students from Taisei Junior High School visits Stillwater Middle School |
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| July | Sister Cities International declares Kameoka and Stillwater winners of the Best Overall Youth Program |
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| | Stillwater High School student Kevin Clayton selected as one of twelve worldwide winners in the SCI Young Artist Contest |
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| August | OSU delegation attends the OSU-K Opening Ceremony |
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| October | Kameoka Rotary Club hosts pottery making and dinner for OSU-K faculty/staff |
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| | OSU-K holds the first Lecture Series for citizens of Kameoka |
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| 1992 | June | Kameoka Rotarians visit Stillwater |
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| July | Members of Stillwater Sister Cities Council and delegation from Kameoka participate in the SCI Convention in Tulsa, Oklahoma |
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| | Kameoka High School student selected as one of twelve worldwide winners in the SCI Young Artist Contest |
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| July | Dedication of Kameoka Koen in Stillwater |
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| October | Stillwater Middle School teacher and two students spend two weeks at Taisei Junior High School as part of the teacher/student exchange program |
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| 1993 | March | Teacher and students of Taisei Junior High School spend two weeks at Stillwater Middle School |
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| April | Kameoka Rotary Club hosts OSU-K faculty/staff for pottery making and dinner |
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| June | Kameoka, Stillwater, and Jandira, Brazil, participate in the SCI Trilateral Exchange Program in Irvine, California |
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| | Members of Kameoka Social Welfare Foundation travel to Stillwater to commemorate their 10th anniversary |
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| 1994 | Feb-June | Kameoka-Stillwater-Jandira trilateral program |
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| July | Stillwater and Kameoka win Reader's Digest award at the SCI Convention in Louisville, Kentucky |
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| November | Mayor Terry Miller, Vice Mayor Larry Brown and City Manager Carl Weinaug of Stillwater travel to Kameoka to attend Culture Day activities |
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| | Stillwater Middle School teacher and two students spend two weeks at Betsuin Junior High School in Kameoka |
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| December | Sister Cities display at Stillwater Public Library |
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| 1995 | February | Stillwater Middle School presents its book entitled "A Day in the Life of a Stillwater Child" to the trilateral program |
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| March | Teacher and two students from Betsuin Junior High School spend two weeks at Stillwater Middle School |
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| April | Stillwater Sister Cities Council sets up a booth at the Run for the Arts Festival and displayed handicraft items sent to Stillwater by the Kameoka Social Welfare Foundation |
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| May | Delegations from Stillwater and Jandira attend trilateral meeting in Osaka and visit Kameoka |
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| July | Stillwater delegation attends the SCI Convention in Indianapolis, Indiana |
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| October | Mayor Yoshihisa Taniguchi and his delegation travel to Stillwater for the 10th Anniversary Celebration of the Sister City Relationship |
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| November | Mayor Terry Miller and his delegation travel to Kameoka for the November 3 Celebration of the Sister City Relationship |
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| 1996 | January | Stillwater Sister Cities Council took part in the Coming of Age Ceremony on the campus of OSU for OSU Japanese students who turn 20 years of age. |
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| March | Teacher and two students from Toki Junior High School of Kameoka visit Stillwater and Stillwater Middle School |
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| April | The annual Young Artist Contest for high school students held. |
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| June | Nine teachers from Stillwater's elementary/middle schools along with a PTA representative spend two weeks in Kameoka. |
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| July | Kameoka Landscape Gardeners Association visited Stillwater to discuss plans and inspect sites for an authentic Japanese garden in Stillwater. |
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| | A delegation from the Lifelong Learning Association visited Stillwater to spend time in English classes at the OSU English Language Institute. |
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| | Two members of Stillwater Sister Cities Council, along with their spouses, attend the International SCI Conference in Boston, Massachusetts. |
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| September | Governor Teiichi Aramaki of Kyoto Prefecture spends a day in Stillwater as part of his visit to the State of Oklahoma. |
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| October | A teacher and two students from Stillwater Middle School visit Kameoka for two weeks. |
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