Why this is the main no-degree route into Japan
Japan's standard teaching visas — the Instructor visa and the Specialist in Humanities/International Services visa — require a bachelor's degree, full stop, regardless of nationality. The working holiday visa is the one significant exception: it doesn't check for a degree at all, because it isn't a teaching visa or even a work-specific visa, it's a general reciprocal travel-and-work arrangement between Japan and specific partner countries.
That's why it matters so much for no-degree teachers from eligible countries — it's essentially the only legal way for a non-degree holder from, say, Australia, Canada, the UK or Ireland to both live in Japan and legally take on paid work, including hours at an eikaiwa or private tutoring.
