Apex domains cannot have CNAME records.
Question and response
Question
dig waves.ne.jp. NS
Answer
waves.ne.jp. 4 NS dns.waves.jp.
waves.ne.jp. 4 NS name.technowave.ad.jp.
waves.ne.jp. 4 NS ns.technowave.ne.jp.
Authority
The response has no authority records.
Additional
ns.technowave.ne.jp. 4 A 202.211.33.74
name.technowave.ad.jp. 4 A 202.211.32.78
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0