No. NC Series are not available in Japan & Korea. Refer the below link
It was announced earlier that NC series will retire on 31st August 2022, however now the date has been extended to 31 August 2023. If you have NC 6 series, you need plan it to deallocate or change the size prior to 31 August 2023. After 31 August 2023, any remaining NC virtual machines on your subscription will be set to a deallocated state, cease to be available, and will no longer incur billing charges.