>>103596822
Language, dumbass. It's the Internet, things aren't really cleanly divided by nation all that often, only language. No one is confused by what "EN" means here, it means primary language streamed in.
>>103596545
>>103596590
>>103596622
Tracked down the chart. 774 and Neo-Porte are exclusively JP, ISEGYE IDOL and Accelers are exclusively KR (and at a glance it looks like Accelers includes some non-vtubers, but if this chart is put together sanely it should be only counting their vtubers), VSPO has an EN branch now but it's still mostly JP, Hololive has a strong EN branch though it's still largely JP and has lost a couple major EN talents, and Nijisanji's EN branch is a far cry from what it used to be. The EN-only version of this chart would doubtless look very different. I imagine chart made from this chart's data sans non-EN and a chart made of entirely new data based the top 4000 EN vtubers only would look fairly different, too.