About one hour later around 22:30JST(UTC+9), I heard Shin-san JA1NUT is chatting with Nathan KO6U/m on the same freq. by Webradio in Utah, USA.
JA1NUT Shin san's signal is much bigger than KO6U/m Nathan's one.
Accutally Shin san's sig heard by Webradio is much better than those heard by actual radio in Tokyo.
Also, Natah's sig is too weak to read by actual radio in tokyo but could be copiable by web radio in Utah.