Ran an APNIC whois and cam up with these abuse contacts:
Kagoya Japan, Inc/KAGOYA Network Administrator Group
nss.ipadmin@kagoya.net & support.domain@kagoya.net
Cached whois for 133.18.202.245 : search-apnic-not-arin@apnic.netI refuse to bother search-apnic-not-arin@apnic.net.
Using search-apnic-not-arin#apnic.net@devnull.spamcop.net for statistical tracking.
Using last resort contacts search-apnic-not-arin#apnic.net@devnull.spamcop.net
Tracking URL:
https://www.spamcop.net/sc?id=z6530520464z62ab467a37e6b02a56ca327c58498ed7z
They also use rir-abuse@oath.com for spam sent from their groups as well as from Yahoo Mail.