These are from various unofficial sources. As always with utility radio, it's only as good as the people who've taken the time to research it.
JOx This block was coast stations; these might be old/ obsolete:
JOE Omaezaki fishing guild (old)
JOF Choshi, may be used in Antarctica
JOG Shizuoka Prefectural Fisheries Experimental Station (old)
JOH Fukushima Prefectural Fisheries Laboratory
JOI Miyagi Prefectural Fisheries Experimental Station JOJ Iwate Prefectural Fisheries Experimental Station
JOK Yokohama International Marine Signal Station
JOL Aomori Prefectural Fisheries Experimental Station
JOM Kochi Prefectural Fisheries Experimental Station
JON Makurazaki fishing association
JOO Ibaraki Prefectural Fisheries Experimental Station
JOP First fishing town Ama Association
JOQ Second fishing town Ama Association
JOR Chiba Prefectural Fisheries Experimental Station
JOS Nagasaki Radio (old public coastal station, now off air)
JOT URA fishermen's union, Muroto
JOU Nagasaki Radio (old coastal station)
JOV URA fishermen's union, Watanoha
JOW Fishery cooperative, Misakicho Yagasaki
JOX Mie Prefectural Fisheries Experimental Station
JOY Aburatsu fishing association
JOZ (JOZ, JOZ2-7) HF broadcasting
JPx This block mostly police, JPA might be INTERPOL
These calls may also be obsolete:
JPV Fishermen's union Kesennuma
JPW Chiba Prefectural Fisheries Experimental Station
JPX Great Japan Sugar, Daito Jima
JPY Far Seas Fisheries Association, Fukuoka, Trawlers
JPZ Far Seas Fisheries, Nagasaki Trawler Association
JSC Call currently used at Kagoshima for Kyodo News FAX on 16971 kHz, 5kW
