showa-group.jp.		30 IN SOA ns3.rental-sv2.jp. root.rental-sv2.jp. (
				2754383201 ; serial
				10800      ; refresh (3 hours)
				1800       ; retry (30 minutes)
				259200     ; expire (3 days)
				0          ; minimum (0 seconds)
				)

showa-group.jp.		30 IN TXT "v=spf1 ip4:211.133.240.0/24 -all"

showa-group.jp.		30 IN A	153.122.205.18

Mail exchangers:
showa-group.jp.		30 IN MX 100 mail.showa-group.jp.

Name servers:
showa-group.jp.		30 IN NS ns4.rental-sv2.jp.
showa-group.jp.		30 IN NS ns3.rental-sv2.jp.