JA3SIA — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA3SIA operating from Japan. 902 FT8 spots received at SO8OO WebSDR, 17 CQ calls, active on 80m, 20m, over 60 days, best SNR +24 dB. Heard between 2026-05-08 and 2026-08-04.

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

Overview

902
Total spots
17
CQ calls
60
Days active
-5 dB
Avg SNR

Bands

80m 20m
First seen: 2026-05-08
Last seen: 2026-08-04 12:18 UTC

Frequent QSO partners observed at SO8OO

Stations JA3SIA worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJA3SIAPartnerPartner SNRMsgs
08-04 14:17 20m +4 / - UA6FZ - / -8 2 ✓ Confirmed
08-02 16:05 20m -10 / - 4L1MA - / -20 12 Partial
08-02 16:02 20m +2 / - F8FUA - / -21 3 Partial
08-02 15:47 20m -12 / - UA4AHP - / -19 2 ✓ Confirmed
08-02 15:22 20m -14 / - R35ARDF - / -16 2 Partial
08-02 14:52 20m -3 / - IZ3ZPO - / -19 3 ✓ Confirmed
08-01 19:17 20m +17 / - IW5DNZ - / -17 2 ✓ Confirmed
08-01 18:50 20m -22 / - SV8KOA - / -17 2 ✓ Confirmed
08-01 18:30 20m -22 / - IK4IDF - / -21 2 ✓ Confirmed
08-01 18:28 20m -18 / - OZ8ABA - / -16 2 ✓ Confirmed
08-01 16:40 20m -9 / - IS0AEL - / -10 3 Partial
08-01 15:29 20m -6 / - R50RKZ - / -14 2 ✓ Confirmed
08-01 12:25 20m -22 / - R8QA - / -14 2 ✓ Confirmed
07-27 18:20 20m -4 / - R2RAU - / -24 3 Partial
07-22 18:43 20m +8 / - OK8WIT - / -17 3 ✓ Confirmed
07-22 16:59 20m -2 / - DL5EBS - / -17 2 Partial
07-20 16:16 20m -2 / - 9A3K - / -12 2 Partial
07-20 15:38 20m -8 / - R2SN - / -10 2 ✓ Confirmed
07-19 14:51 20m +2 / - DL1R - / - 7 Partial
07-19 14:47 20m -10 / - PD8RUK - / -24 6 Partial
07-19 14:03 20m -14 / - RA6BX - / -24 4 ✓ Confirmed
07-18 14:47 20m -8 / - R2SN - / -19 2 Partial
07-14 17:33 20m -18 / - IU2LSZ - / - 2 Partial
07-13 17:23 20m -12 / - IT9VCE - / -10 2 ✓ Confirmed
07-13 17:19 20m +6 / - DL8TV - / -21 4 Partial
07-13 15:48 20m -12 / - ON4AZR - / -15 3 Partial
07-12 17:55 20m -18 / - E77FN - / -18 2 Partial
07-12 17:47 20m +5 / - UT4LU - / -17 4 ✓ Confirmed
07-12 17:46 20m -10 / - IK4RVY - / -19 2 ✓ Confirmed
07-12 17:39 20m -3 / - S52D - / - 2 Partial
07-12 15:21 20m -10 / - RM8W - / -18 3 ✓ Confirmed
07-11 19:21 20m -1 / - EA3ADX - / -15 2 Partial
07-11 18:51 20m -10 / - OH7BDI - / -25 2 ✓ Confirmed
07-11 18:29 20m -19 / - DL6EL - / -16 2 ✓ Confirmed
07-11 18:15 20m -2 / - EA5HEU - / - 4 Partial
07-11 18:05 20m -6 / - <...> - / -14 4 Partial
07-11 17:43 20m +4 / - IU3VHR - / -15 4 Partial
07-11 17:20 20m -20 / - DF2FE - / -24 2 ✓ Confirmed
07-11 17:19 20m -6 / - IT9JFO - / - 8 ✓ Confirmed
07-11 17:17 20m -20 / - UR3QCC - / -9 2 ✓ Confirmed
07-11 16:56 20m +3 / - YO2CPS - / -8 3 Partial
07-11 15:08 20m 0 / - R8DX - / -12 2 Partial
07-10 13:42 20m -22 / - R2AL - / - 2 Partial
07-08 15:55 20m -9 / - R4RM - / -16 2 ✓ Confirmed
07-07 22:15 20m -18 / - EC3A - / - 2 ✓ Confirmed
07-07 18:12 20m -10 / - YO4GIY - / -15 2 ✓ Confirmed
07-06 18:48 20m -19 / - RW9QA - / -10 2 ✓ Confirmed
07-06 17:10 20m -11 / - R2GDV - / -21 2 Partial
07-05 17:21 20m -3 / - F4BYA - / - 2 Partial
07-03 13:51 20m +1 / - DA0WWA - / -18 3 Partial

Station Log

20m 
UTC    dB  Freq  Message
160315  +1 1532  JA3SIA F8FUA -21
160545  -4 2505  JA3SIA 4L1MA -20 (x12)
141745  +2  509  JA3SIA UA6FZ -08 (x2)
80m 
UTC    dB  Freq  Message
185245  +0  952  JA3SIA UA3QNA -08 (x2)
025030  +6 1567  JA3SIA 9A4ZM JN86 (x3)

SNR History by Band