jpn.org.		30 IN SOA dns.sakura.ad.jp. noc.sakura.ad.jp. (
				2025041100 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				3600000    ; expire (5 weeks 6 days 16 hours)
				3600       ; minimum (1 hour)
				)

Name servers:
jpn.org.		30 IN NS ns1.dns.ne.jp.
jpn.org.		30 IN NS ns2.dns.ne.jp.