ps8a.spcmail.jp has no NS records.
NS records for this zone are defined at spcmail.jp.
NS records for this zone are defined at spcmail.jp.
Question and response
Question
dig ps8a.spcmail.jp. NS
Answer
The response has no answer records.
Authority
spcmail.jp. 900 SOA ns-798.awsdns-35.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0