Radio.chibo.net found a note on radionikkei.jp that some Radio Nikkei
shortwave frequencies will be temporarily off air for maintenance in Nov/Dec
2017 as follows (TNX XYZ!):
Radio Nikkei 1:
3925 every Monday to
Friday in December
9595 every Monday to Friday in November
3925 from
Nemuro (1650-2400, 0700-0800 LT / 0750-1500, 2200-2300 UTC): every Monday to
Friday in November
[so the main 3925 outlet from Chiba is not
affected!]
Radio Nikkei 2:
3945 every Monday to Friday in
November and December at 0800-1900 LT (2300-1000 UTC)
9760 every Monday to
Friday in November and December at 0800-1700 LT (2300-0800
UTC)
Operations on 6 MHz and on the weekends continue as usual.
(Eike Bierwirth via dxld yg)