JA4JKO — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA4JKO operating from Japan. 353 FT8 spots received at SO8OO WebSDR, 46 CQ calls, active on 80m, 40m, 20m, 10m, over 40 days, best SNR +22 dB. Heard between 2026-04-21 and 2026-06-28.

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

Overview

353
Total spots
46
CQ calls
40
Days active
-3 dB
Avg SNR

Bands

80m 20m 40m 10m
First seen: 2026-04-21
Last seen: 2026-06-28 20:16 UTC

Frequent QSO partners observed at SO8OO

Stations JA4JKO worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJA4JKOPartnerPartner SNRMsgs
06-28 22:16 20m -10 / - IZ0NPM - / -7 2 ✓ Confirmed
06-25 22:09 20m -12 / - A91LD - / -21 2 ✓ Confirmed
06-25 21:57 20m -8 / - <...> - / -6 2 Partial
06-07 21:56 20m - / - PS8CW -9 / - 4 Partial
06-07 21:55 20m - / -9 SP9NVY -6 / - 2 ✓ Confirmed
06-07 21:53 20m -1 / - EA3CHO -7 / -22 3 Partial
06-07 21:51 20m -9 / - RI0SP - / -11 2 Partial
06-07 21:47 20m - / - EA3CHO -2 / - 4 Partial
06-07 21:41 20m -11 / - PD0PHA -5 / -18 7 Partial
06-07 21:40 20m - / - SV9QWC -6 / - 2 Partial
06-07 21:38 20m +2 / -17 EA8CDG -6 / -9 8 ✓ Complete
06-06 22:12 20m - / - YO6UI -12 / - 2 Partial
06-06 22:03 20m - / - SV9QWC -2 / - 2 Partial
06-06 22:02 20m - / - 9X5KM +2 / - 2 Partial
06-06 22:00 20m - / - SP9DTE 0 / - 3 Partial
06-06 21:57 20m -12 / -18 IW5ALZ +2 / - 3 Partial
06-06 21:56 20m +2 / - ON1PK - / - 3 Partial
06-06 21:55 20m - / -6 SP2EWQ +2 / - 2 ✓ Confirmed
06-06 21:52 20m - / - SV9QWC +6 / - 2 Partial
06-06 21:45 20m - / -10 SP6PKR -3 / - 3 ✓ Confirmed
06-06 21:34 20m -14 / - EA5JLX - / -13 2 ✓ Confirmed
06-06 21:24 20m -4 / - EA6/DL4XT 0 / -17 4 Partial
06-06 21:22 20m 0 / -16 DB5BC +1 / -15 11 ✓ Complete
06-05 21:24 20m - / - UR5WCS +3 / - 2 Partial
06-05 21:19 20m -6 / -12 SP5DAA 0 / -14 7 ✓ Complete
06-05 21:18 20m - / - S55A +2 / - 3 Partial
06-05 21:15 20m - / -12 CX2RA +4 / - 4 Partial
06-04 22:13 20m - / -16 OJ0Z -4 / - 3 Partial
06-04 22:03 20m - / - OJ0Z -12 / - 3 Partial
06-04 22:00 20m - / -11 OE5XPM -11 / - 2 Partial
06-04 21:55 20m -6 / - EA5DE -14 / -13 4 Partial
06-04 21:53 20m - / - DJ2KP -9 / - 2 Partial
06-04 21:50 20m - / - DA1MO -10 / - 2 Partial
06-04 21:48 20m - / - OZ1BW -2 / - 3 Partial
06-04 21:46 20m -14 / - IQ9NI -13 / - 3 ✓ Verified
06-04 21:41 20m -16 / - <...> -7 / -16 6 Partial
06-04 21:34 20m +10 / -10 DF7JU -8 / -11 12 ✓ Complete
06-02 21:23 20m -10 / - IZ7RJT - / -15 2 Partial
06-02 21:22 20m -16 / - YU1HQR - / -20 2 Partial
06-02 21:14 20m -3 / - DL7UDK - / -9 2 ✓ Confirmed
06-01 21:13 20m - / -16 SQ6FHD 0 / - 4 ✓ Confirmed
06-01 21:04 20m - / -19 YU7MD -5 / - 3 Partial
06-01 20:57 20m - / - IQ6SB -4 / - 2 Partial
05-31 21:31 20m - / - E79KO -13 / - 2 Partial
05-31 21:25 20m - / -19 YU5BU 0 / - 5 Partial
05-31 21:22 20m - / -14 EA7LHH +1 / - 3 ✓ Confirmed
05-29 21:44 20m - / - OK1DXR 0 / - 3 Partial
05-29 21:42 20m - / -12 SP9HAB 0 / - 5 ✓ Confirmed
05-29 21:37 20m - / -15 SP6JM -6 / - 3 ✓ Confirmed
05-29 21:34 20m -14 / -17 DJ5AS -4 / -20 8 Partial

Station Log

20m 
UTC    dB  Freq  Message
215600  -6 2388  SP9NVY JA4JKO 73
215630  -8 2388  PS8CW JA4JKO PM64 (x4)
215430  -5  333  JA4JKO AO25HSJ -06
215700  -9  332  JA4JKO <...> -06 (x2)
220530  -9  578  JA4JKO A91LD -17
220715 -18 1775  JA4JKO IZ2FTR RR73
220900 -12  578  JA4JKO A91LD -21 (x2)
215745  -6  523  JA4JKO OD5ZF RR73
221615 -12  891  JA4JKO IZ0NPM -07 (x2)
40m 
UTC    dB  Freq  Message
205845  -3 2719  JA4JKO R7OV KN87
211530 +15 2886  JA4JKO <...> -21
205700  -1  356  JA4JKO AU2M -11 (x2)
204730 -15 1381  JA4JKO SX100PAOK -15
204930 +22 2849  JA4JKO IW8RCN -15
204730 +14  429  JA4JKO SX1FLY -20
204215  -9 2296  JA4JKO UK8OM -13 (x2)
203830 -19  971  JA4JKO R6LPF KN97
204415 +13 1704  JA4JKO LZ100LZ -15 (x3)
204230 +22 2344  JA4JKO IZ0BYM R-22 (x2)
10m 
UTC    dB  Freq  Message
071300 +11 2460  JA4JKO LZ2INP KN34 (x3)
083045  -5 2543  JA4JKO YU7ZZ -08 (x5)
083430 -12 1577  JA4JKO VU2KPH -12 (x2)
80m 
UTC    dB  Freq  Message
221615  -6  916  JA4JKO SM7IYM JO65

SNR History by Band