jp.			30 IN SOA z.dns.jp. root.dns.jp. (
				1768671003 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				1814400    ; expire (3 weeks)
				900        ; minimum (15 minutes)
				)

Name servers:
jp.			30 IN NS f.dns.jp.
jp.			30 IN NS g.dns.jp.
jp.			30 IN NS h.dns.jp.
jp.			30 IN NS a.dns.jp.
jp.			30 IN NS b.dns.jp.
jp.			30 IN NS c.dns.jp.
jp.			30 IN NS d.dns.jp.
jp.			30 IN NS e.dns.jp.