Field data · Japan

Mobile data speed in Japan: our field tests

Direct answer

Our eSIM Japan field tests include 12 measurements taken across 12 locations. The most recent measurement was taken on June 30, 2026. Median download speed is 79.9 Mbps and median latency is 194.0 ms. These results describe only the tested locations and not nationwide coverage.

Real mobile speed measurements taken on the ground in Japan, with our own eSIM. 12 test(s) so far.

12 measurements

79.9
Median speed (Mbps)
Tokyo Haneda Airport Hnd
Fastest place
194.0
Median latency (ms)
12
Measurements

Map of measurements

Complete results table

CityExact locationDownloadUploadPingJitterLocal operatorDetected networkSpeedtest serverServer locationDate
ShizuokaMakinohara27.5 Mbps3.63 Mbps341 ms39 msNTT DocomoHutchison HKContaboNot detected2026-06-30
OsakaAirport KIX19.3 Mbps12.6 Mbps164 ms38 msNTT DocomoHutchison HKIPA CyberLab 400GNot detected2026-06-30
NagoyaToyoake135.0 Mbps3.84 Mbps672 ms58 msNTT DocomoHutchison HKRakuten Mobile, IncSanda2026-06-30
TokyoAsakusa71.3 Mbps11.4 Mbps169 ms10 msNTT DocomoHutchison HKContaboTokyo2026-06-25
TokyoNarita117.0 Mbps17.0 Mbps200 ms10 msNTT DocomoHutchison HKIPA CyberLabNot detected2026-06-22
SapporoChitose Airport18.6 Mbps3.76 Mbps206 ms34 msNTT DocomoHutchison HKNot detectedTokyo2026-06-22
SapporoCenter189.0 Mbps25.9 Mbps210 ms28 msNTT DocomoHutchison HKSTCHong Kong2026-06-22
TokyoYoyogi40.9 Mbps9.43 Mbps177 ms30 msNTT DocomoHutchison HKKairun ServicesChiba2026-06-18
TokyoShinjuku121.0 Mbps29.3 Mbps161 ms26 msNTT DocomoHutchison HKIPA CyberLab 400GTokyo2026-06-18
TokyoShibuya crossing88.5 Mbps15.0 Mbps188 ms25 msNTT DocomoHutchison HKIPA CyberLabBunkyo2026-06-18
TokyoHarajuku67.0 Mbps22.4 Mbps188 ms46 msNTT DocomoHutchison HKIPA CyberLabBunkyo2026-06-18
TokyoHaneda Airport HND221.0 Mbps27.2 Mbps328 ms35 msNTT DocomoHutchison HKContaboNot detected2026-06-17

By operator

NTT Docomo79.9

Measurement detail

By city: Download (Mbps)

MedianMeanMinMaxTests
Nagoya135.0135.0135.0135.01
Sapporo103.8103.818.6189.02
Tokyo88.5103.840.9221.07
Shizuoka27.527.527.527.51
Osaka19.319.319.319.31

By city: Upload (Mbps)

MedianMeanMinMaxTests
Tokyo17.018.89.429.37
Sapporo14.814.83.825.92
Osaka12.612.612.612.61
Nagoya3.83.83.83.81
Shizuoka3.63.63.63.61

By city: Latency (ms)

MedianMeanMinMaxTests
Nagoya6726726726721
Shizuoka3413413413411
Sapporo208.02082062102
Tokyo188201.61613287
Osaka1641641641641

By city: Jitter (ms)

MedianMeanMinMaxTests
Nagoya585858581
Shizuoka393939391
Osaka383838381
Sapporo31.03128342
Tokyo262610467

By operator: Download (Mbps)

MedianMeanMinMaxTests
NTT Docomo79.993.018.6221.012

By operator: Upload (Mbps)

MedianMeanMinMaxTests
NTT Docomo13.815.13.629.312

By operator: Latency (ms)

MedianMeanMinMaxTests
NTT Docomo194.0250.316167212

By operator: Jitter (ms)

MedianMeanMinMaxTests
NTT Docomo32.031.6105812

How we measure

Every measurement is taken on location, with our own eSIM, in real travel conditions: a precise place, a time, a connected network. We record download and upload speed, latency, then publish the result unedited.

The aggregates (median, mean, extremes) build up as we travel. The more measurements a destination has, the more reliable its median becomes. The median resists the extreme values of a single test better than the mean.

All tests in Japan

Tokyo7
Tokyo Asakusa
Download71.3 Mbps
Upload11.4 Mbps
Ping169 ms
Jitter10 ms
Download latency350 ms
Upload latency463 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
Contabo
Server location
Tokyo
Device
Pixel 9a
Connection
Not detected
Technology
Not detected
Test time
23:03
Screenshot time
14:33
Speedtest ID
11705588383
Source
speedtest_app
Tokyo Narita
Download117.0 Mbps
Upload17.0 Mbps
Ping200 ms
Jitter10 ms
Download latency924 ms
Upload latency175 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
IPA CyberLab
Server location
Not detected
Device
Not detected
Connection
Not detected
Technology
Not detected
Test time
14:28
Screenshot time
12:25
Speedtest ID
Not detected
Source
speedtest_app
Tokyo Shinjuku
Download121.0 Mbps
Upload29.3 Mbps
Ping161 ms
Jitter26 ms
Download latency119 ms
Upload latency138 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
IPA CyberLab 400G
Server location
Tokyo
Device
Pixel 9a
Connection
Not detected
Technology
Not detected
Test time
09:32
Screenshot time
14:46
Speedtest ID
11690289616
Source
speedtest_app
Tokyo Shibuya Crossing
Download88.5 Mbps
Upload15.0 Mbps
Ping188 ms
Jitter25 ms
Download latency610 ms
Upload latency301 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
IPA CyberLab
Server location
Bunkyo
Device
Pixel 9a
Connection
5G
Technology
Not detected
Test time
09:36
Screenshot time
13:46
Speedtest ID
Not detected
Source
speedtest_app
Tokyo Harajuku
Download67.0 Mbps
Upload22.4 Mbps
Ping188 ms
Jitter46 ms
Download latency571 ms
Upload latency742 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
IPA CyberLab
Server location
Bunkyo
Device
Pixel 9a
Connection
Not detected
Technology
Not detected
Test time
09:38
Screenshot time
13:11
Speedtest ID
11690168822
Source
speedtest_app
Tokyo Yoyogi
Download40.9 Mbps
Upload9.43 Mbps
Ping177 ms
Jitter30 ms
Download latency939 ms
Upload latency465 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
Kairun Services
Server location
Chiba
Device
Pixel 9a
Connection
Not detected
Technology
Not detected
Test time
09:39
Screenshot time
13:02
Speedtest ID
11690156254
Source
speedtest_app
Tokyo Haneda Airport Hnd
Download221.0 Mbps
Upload27.2 Mbps
Ping328 ms
Jitter35 ms
Download latency830 ms
Upload latency356 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
Contabo
Server location
Not detected
Device
Pixel 9a
Connection
Not detected
Technology
Not detected
Test time
07:03
Screenshot time
01:32
Speedtest ID
Not detected
Source
speedtest_app
Sapporo2
Sapporo Chitose Airport
Download18.6 Mbps
Upload3.76 Mbps
Ping206 ms
Jitter34 ms
Download latency56 ms
Upload latency515 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
Not detected
Server location
Tokyo
Device
Pixel 9a
Connection
5G
Technology
Not detected
Test time
14:36
Screenshot time
08:58
Speedtest ID
Not detected
Source
speedtest_app
Sapporo Center
Download189.0 Mbps
Upload25.9 Mbps
Ping210 ms
Jitter28 ms
Download latency568 ms
Upload latency463 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
STC
Server location
Hong Kong
Device
Pixel 9a
Connection
5G
Technology
Not detected
Test time
14:35
Screenshot time
11:36
Speedtest ID
11696647708
Source
speedtest_app
Nagoya1
Nagoya Toyoake
Download135.0 Mbps
Upload3.84 Mbps
Ping672 ms
Jitter58 ms
Download latency808 ms
Upload latency487 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
Rakuten Mobile, Inc
Server location
Sanda
Device
Not detected
Connection
5G
Technology
Not detected
Test time
04:54
Screenshot time
09:01
Speedtest ID
11709665851
Source
speedtest_app
Osaka1
Osaka Airport KIX
Download19.3 Mbps
Upload12.6 Mbps
Ping164 ms
Jitter38 ms
Download latency102 ms
Upload latency282 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
IPA CyberLab 400G
Server location
Not detected
Device
Not detected
Connection
5G
Technology
Not detected
Test time
04:52
Screenshot time
08:47
Speedtest ID
Not detected
Source
speedtest_app
Shizuoka1
Shizuoka Makinohara
Download27.5 Mbps
Upload3.63 Mbps
Ping341 ms
Jitter39 ms
Download latency927 ms
Upload latency376 ms
Local operator
NTT Docomo
Detected network
Hutchison HK
Speedtest server
Contabo
Server location
Not detected
Device
Not detected
Connection
LTE
Technology
Not detected
Test time
04:49
Screenshot time
14:30
Speedtest ID
Not detected
Source
speedtest_app
Cite this data
eSIM field data, real measurements. Reusable with attribution. https://driftasia.com/field-tests/
← All field tests