ISWC · Musical Work
昨日への手紙
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The ISWC for “昨日への手紙” is T-101177176-7. ISWCs are ISO 15707 identifiers managed by CISAC; they identify the underlying song — its melody, lyrics, and arrangement — rather than any single recording. One composition can have many recordings (ISRCs). This work has 2 known recordings (ISRCs) indexed on Credits.fm.
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T-101177176-7 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “昨日への手紙”. ISWCs are defined by ISO 15707 and managed by CISAC. Unlike ISRCs which identify recordings, an ISWC identifies the underlying song — the melody, lyrics, and arrangement.
This work has 2 recordings (ISRCs) associated with it. Each recording represents a distinct version — such as the original, a remix, a live performance, or a cover — that shares the same underlying composition.
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JPTO08300270MLC Song Code
