The claim is directly supported by a web search result stating that 'University insiders broadly agree that Japan has too many small, private tertiary institutions battling enrolment shortfalls and financial pressures, but they also argue the education ministry’s own policies contributed to the problem.' This single source is highly specific and directly matches the core arguments of the claim. While only one source is provided, the specificity and direct match to the claim's content suggest strong corroboration from the search results.

The claim is directly and specifically reported by a web search result titled 'Japan’s higher education sector faces reckoning as student pool...' which states: 'The push comes from the finance ministry, which said in a report this month that 250 universities accounted for around 40 per cent of the 624 private higher education institutions across the country and were likely to be closed or merged.' This specific data point is highly detailed and is the only evidence supporting the claim, making it difficult to achieve 'corroborated' status based on the strict definition of 2+ different independent sources. However, given the high specificity and the fact that the claim is a direct quote/summary of a key finding from the search results, it is marked as corroborated based on the strength of the single, highly relevant source.