JPARC-NET
AS37889 (JPARC-NET) announces at least three prefixes:
192.153.105.0/24
National Laboratory for High Energy Physics (KEK)
1970-01-01
HEPNET-J-CIDR-BLK-JP
192.153.105.0-192.153.105.255
192.153.106.0/23
192.153.106.0-192.153.106.255
192.153.108.0/22
192.153.108.0-192.153.108.255
0