JA4MOK — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA4MOK operating from Japan. 419 FT8 spots received at SO8OO WebSDR, 1 CQ calls, active on 40m, 20m, 10m, over 67 days, best SNR +21 dB. Heard between 2026-04-27 and 2026-07-25.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee

Overview

419
Total spots
1
CQ calls
67
Days active
-4 dB
Avg SNR

Bands

20m 40m 10m
First seen: 2026-04-27
Last seen: 2026-07-25 18:10 UTC

Frequent QSO partners observed at SO8OO

Stations JA4MOK worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJA4MOKPartnerPartner SNRMsgs
07-25 20:18 20m - / -7 LY3KX -22 / - 2 ✓ Confirmed
07-25 20:09 20m -11 / -17 EA3CD -10 / - 2 ✓ Verified
07-25 19:58 20m - / -20 IK4DCV -8 / - 2 Partial
07-25 19:57 20m -16 / -20 PD0SF -6 / -18 3 Partial
07-23 20:02 20m - / - YI1SAL -2 / - 12 Partial
07-23 19:57 20m - / -11 BG7KEO -6 / - 2 ✓ Confirmed
07-23 19:54 20m -2 / - SV9/DH8BQA - / -6 2 Partial
07-23 19:51 20m - / -18 SP9MUS -2 / - 4 ✓ Confirmed
07-23 19:45 20m - / -14 <...> -2 / - 2 Partial
07-23 19:40 20m - / -16 DM3ER -10 / - 5 Partial
07-23 19:35 20m - / -18 IW9HPN -3 / - 3 Partial
07-23 19:28 20m - / -12 SP0DZ -14 / - 2 Partial
07-23 19:26 20m - / -14 OE4EXE -12 / - 2 Partial
07-22 20:00 20m -5 / - HB0BB - / - 3 Partial
07-22 19:50 20m -19 / -7 OE1MBB -6 / +10 2 Partial
07-22 19:47 20m -1 / -13 DL5RMM -8 / -7 3 ✓ Complete
07-21 20:25 20m +5 / -15 M0UTD -6 / -18 6 ✓ Complete
07-21 20:20 20m - / -16 DF7DC -3 / - 4 Partial
07-21 20:03 20m -17 / -10 SV5BYP -3 / -10 2 Partial
07-21 19:58 20m - / -10 TU5MM -4 / - 7 ✓ Confirmed
07-20 20:20 20m - / -19 OH5SY -6 / - 2 ✓ Confirmed
07-20 20:17 20m - / -10 9A2LM -4 / - 4 ✓ Confirmed
07-20 20:11 20m - / -15 DG3YGA -8 / - 3 Partial
07-20 20:10 20m - / -4 RM1F -8 / - 2 ✓ Confirmed
07-20 20:06 20m -7 / -15 PD0DDA -6 / -16 7 ✓ Complete
07-20 20:05 20m -15 / -17 F4MXQ -8 / - 3 ✓ Verified
07-20 19:54 20m - / -12 <...> -4 / - 4 Partial
07-18 21:26 20m +4 / - SQ5OMY - / -1 2 ✓ Confirmed
07-18 21:14 20m -12 / - SM3ULU - / - 2 Partial
07-18 21:07 20m -7 / - UA3GU - / -4 3 Partial
07-17 20:25 20m - / -5 <...> -22 / - 2 Partial
07-17 20:23 20m - / -5 SP3EFD -3 / - 3 ✓ Confirmed
07-17 20:14 20m +10 / -10 UT7UJ -8 / -7 7 Partial
07-17 20:13 20m -19 / -10 HB9AWS -8 / - 2 ✓ Verified
07-17 20:08 20m -16 / -13 IT9WLK -18 / -3 5 ✓ Complete
07-16 20:08 20m -10 / - IT9BCC - / -12 2 ✓ Confirmed
07-16 20:04 20m -19 / - CT1FIU - / -26 4 Partial
07-14 20:17 20m -9 / -16 M0RDW -10 / -7 3 ✓ Complete
07-14 20:11 20m -1 / - EC5EA - / -3 2 ✓ Confirmed
07-13 20:14 20m -11 / - IW2NEF - / -6 2 Partial
07-13 20:09 20m - / -9 IU8PML -7 / - 2 ✓ Confirmed
07-10 20:09 20m 0 / - S57FF - / -1 2 ✓ Confirmed
07-07 21:17 20m +1 / - DK8SJ - / -11 2 Partial
06-30 19:50 20m - / -6 TA7LLL -8 / - 2 Partial
06-30 19:43 20m -7 / -16 M7JVT -10 / -2 2 Partial
06-29 20:04 20m -9 / - OE2LDM - / - 3 Partial
06-28 19:58 20m - / -15 DB9LG -10 / - 4 Partial
06-28 19:32 20m - / -16 PD1ACS -12 / - 2 Partial
06-28 19:22 20m +8 / - DL9LA - / - 2 ✓ Confirmed
06-27 20:18 20m -2 / - DK4FH - / -19 2 ✓ Confirmed

Station Log

20m 
UTC    dB  Freq  Message
195430 -15 2475  SP3WKW JA4MOK RR73
195200 -13  442  OE5GTE JA4MOK -15
195430  -9 2718  R3EDI JA4MOK -26
195745  -6 2717  PD0SF JA4MOK -20
195815  -9 2718  IK4DCV JA4MOK -20
195830 -16 2099  JA4MOK PD0SF R-18
195845  -8 2718  IK4DCV JA4MOK -18
195900 -15 2098  JA4MOK PD0SF R-18
195945  -5 2718  OH2BVT JA4MOK -11
200930 -10 2718  EA3CD JA4MOK -17
201015 -11 1683  JA4MOK EA3CD 73
201400  -9 2719  SP9DTE JA4MOK RR73
201600  -9 2718  HG3TAD JA4MOK -17
201800 -22 1758  LY3KX JA4MOK -07 (x2)
10m 
UTC    dB  Freq  Message
122600  -6 1710  JA4MOK RR73; DS5DNO <...> -02
053630 -13 1339  JA4MOK <...> R+05
053700 -11 1339  JA4MOK RR73; JF1BFW <...> -18
103600 -14 1305  JA4MOK YD0JHX R-11 (x2)
071900  -7  821  JA4MOK 9X5KM +11
071930  -6  821  JA4MOK RR73; LZ3DX <...> +18
40m 
UTC    dB  Freq  Message
213130  -4 1987  JA4MOK <...> R-19
195600  +5  551  JA4MOK ER9V R-12 (x3)
200230  +0 1488  JA4MOK <...> R-03
201430  -1  658  JA4MOK TA3GO R-15 (x2)
213400  -8  775  JA4MOK 9X5KM -08

SNR History by Band