Apex domains cannot have CNAME records.
Question and response
Question
dig awk.jp. NS
Answer
awk.jp. 3 NS ns.awk.jp.
awk.jp. 3 NS ns06.xbit.jp.
Authority
The response has no authority records.
Additional
ns06.xbit.jp. 1 A 59.106.75.239
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0