SYOT is not heavily split in the current catalog, but the short label still hides the underlying IANA zone and any future policy change. The safe pattern is to write the abbreviation for humans and the zone for machines.
Antarctica/Syowa does not show an offset change in the next year, which makes SYOT predictable for short-term scheduling. Predictable is not the same as permanent — civil-time rules still get changed by governments on relatively short notice.
For precise work, the safest equivalent of SYOT is the exact IANA zone used by your city or system. Antarctica/Syowa sits at +03:00, ahead of UTC, which means daily logs in this zone reach a new calendar date before UTC does — a small detail that breaks date-based reporting if missed.
Within this single zone (Antarctica/Syowa, +03:00), SYOT is unambiguous, so the abbreviation and the IANA zone effectively interchange.