nx1.gtq.jp has no NS records.
NS records for this zone are defined at gtq.jp.
NS records for this zone are defined at gtq.jp.
Question and response
Question
dig nx1.gtq.jp. NS
Answer
The response has no answer records.
Authority
gtq.jp. 1800 SOA celeste.ns.cloudflare.com. dns.cloudflare.com. 2399843665 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0