Have you ever noticed the intriguing resemblance between Toru Takemitsu's "Rain Spell" and Pierre Boulez's "Derive"? It's quite astonishing to think that Boulez composed his work merely a year after Takemitsu's piece premiered in Japan. Could it be possible that Boulez had heard Takemitsu's work before creating "Derive"? We may never have concrete answers. Yet, it is not uncommon for two individuals to independently explore similar ideas without knowledge of each other's endeavors. The most striking connection lies in the instrumentation of Takemitsu's "Rain Spell": Flute, Clarinet, Harp, Piano, and Vibraphone. Boulez's "Derive" follows a similar path with flute, clarinet in A, vibraphone, piano, violin, and cello. The notable difference lies in the addition of violin and cello, perhaps to achieve a balanced string timbre. While the harp serves as an intermediary instrument in Takemitsu's work, the pi