Yajima-kun presented a talk at OARConline 35a, which is held online this year. 

At 15:05 UTC we have our first presentation by Masanori Yajima from Waseda University about 'How prevalent is the operation of DNS security mechanisms?'

Slides: https://t.co/OuQZKqJg3C #DNS #LoveDNS #OARC35a ^MV pic.twitter.com/1XFAQCNAAE

— DNS-OARC (@dnsoarc) September 8, 2021

M. Yajima, D. Chiba, Y. Yoneya, and T. Mori, “How prevalent is the operation of DNS security mechanisms?“[Video Talk][PDF]