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Published studies from Webbigdata Streaming Data Lab. Read the findings alongside their methods, limitations, and supporting data.

Reports available in English

These are published observational studies. Their sample sizes and findings apply to the stated study populations and periods, not to all of YouTube.

English · VTuber activityPublished
Updated

Do VTubers stop growing when they take a break?

A study of 20,002 breaks across 9,006 VTuber channels. The revised analysis excludes view-growth comparisons spanning YouTube’s August 24 counting change and examines whether activity returned to its pre-break pace.

The full report explains the smaller comparison groups, members-only activity audit, and limits of causal interpretation.

English · YouTube sentimentPublished

41 Days of World Cup Emotion

A visualization of YouTube sentiment toward all 48 national teams at the 2026 FIFA World Cup, using a search panel covering 47 countries. The dataset includes 41 daily snapshots and 767,361 analyzed comments.

The study describes search-panel coverage and AI sentiment classification. It is not a representative survey of national public opinion.

More studies · Japanese reports

The summaries below are in English; the full reports are in Japanese.

Browse the Japanese research index

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Use each report’s current methods, exclusions, and correction notes when describing its findings. Cite TubeSaku, the report title and URL, and the study period. Follow report-specific reuse instructions; a download link does not imply unrestricted redistribution.

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For custom creator-discovery work, see our custom analysis information. Published research above is separate from sales examples and illustrative candidate lists.