In 2011, Japanese guitar teacher Fumiyoshi Kamo landed the Guinness World Record for the ‘world’ largest online guitar lesson,’ which featured 8,776 guitarists learning a one-hour guitar class from him.
Published in the English daily newspaper The Morung Express from Nagaland, India (Byline: Al Ngullie).
Official information: https://www.morungexpress.com/page/grievance-redressal-the-morung-express
The same article is also reposted at the following link:
Guinness World Records: Join the 'World's Largest Guitar Ensemble'
https://nagalandmusic.blogspot.com/2013/01/guinness-world-records-join-worlds.html