By 1970, Takemitsu's reputation as a leading member of avant-garde community was well established, and during his involvement with Expo '70 in Osaka, he was at last able to meet more of his Western colleagues, including Karlheinz Stockhausen. Also, during a contemporary music festival in April 1970, produced by the Japanese composer himself ("Iron and Steel Pavilion"), Takemitsu met among the participants Lukas Foss, Peter Sculthorpe, and Vinko Globokar. Later that year, as part of a commission from Paul Sacher and the Zurich Collegium Musicum, Takemitsu incorporated into his "Eucalypts I" parts for international performers: flautist Aurèle Nicolet, oboist Heinz Holliger, and harpist Ursula Holliger.