Help for a tourist who wants to go to 2 metal concerts

Hi everybody I hope you having a good day!
I am coming to Japan in 22 of Sept for nearly a month and I really want to go to 2 concerts (links below).
some people I have spoken with said thats the main site in Japan but I cant order tickets from there becuase I requires Japanese Phone number and Email. If anybody here has a better site or knows some english speakers in Japan who would enjoy this kind of music and wants to help a metal fan tourist and meet I will be more than grateful !
https://eplus.jp/sf/detail/1654150001-P0030122?clickref=1101lBFmkeNd
and
https://eplus.jp/sf/detail/1299880001-P0030010?clickref=1110lp6XLAU