Mobile
Rank
60 -2
Download
89.53 Mbps
Upload
13.70 Mbps
Latency
41 ms
Fixed Broadband
Rank
8 -
Download
320.37 Mbps
Upload
223.13 Mbps
Latency
21 ms
Mobile
Rank
58 -1
Download
48.43 Mbps
Upload
8.94 Mbps
Latency
35 ms
Fixed Broadband
Rank
15 -
Download
199.10 Mbps
Upload
115.52 Mbps
Latency
12 ms

Starting June 2024, location inclusion criteria use the Precision Validity Score (PVS) for mobile and fixed broadband. Results are updated mid-month for the previous three months.

Market Analysis

Fastest Providers - Download

Speedtest Intelligence® reveals that among top fixed broadband providers in Japan in Q4 2023, So-net delivered the fastest median download speed at 296.29 Mbps.

Median Download Speed Mbps
Provider

296.29

So-net

210.93

SpaceX Starlink

210.47

BIGLOBE

201.41

J:COM

153.43

au

128.84

Asahi Net

115.80

Arteria

114.01

OCN

106.72

SoftBank

0100200300
Error bars indicate 95% CI

Fastest Providers - Upload

Calculating median upload speed for top fixed broadband providers in Japan during Q4 2023, So-net had the fastest median upload speed at 219.53 Mbps.

Median Upload Speed Mbps
Provider

219.53

So-net

141.70

BIGLOBE

95.44

Arteria

93.52

au

93.36

Asahi Net

93.34

OCN

92.95

SoftBank

14.43

SpaceX Starlink

9.71

J:COM

0100200300
Error bars indicate 95% CI

Median Multi-Server Latency

Our fixed broadband multi-server latency results in Q4 2023 showed that among top providers, So-net registered the lowest median multi-server latency in Japan at 9 ms.

Median Multi-Server Latency ms
Provider

9

So-net

14

Arteria

15

BIGLOBE

15

Asahi Net

16

SoftBank

17

au

21

OCN

30

J:COM

45

SpaceX Starlink

01020304050
Error bars indicate 95% CI

Consistency

In measuring the consistency of each fixed broadband provider’s performance, we found that SpaceX Starlink had the highest Consistency in Japan during Q4 2023, with 96.4% of results showing at least a 25 Mbps minimum download speed and 3 Mbps minimum upload speed.

Consistency (%)
Provider

96.4%

SpaceX Starlink

93.1%

So-net

92.8%

BIGLOBE

89.1%

Arteria

88.9%

Asahi Net

87.5%

J:COM

86.8%

OCN

85.6%

au

83.3%

SoftBank

Market Analysis

Fastest Providers - Download

Speedtest Intelligence® reveals that among top mobile operators in Japan in Q4 2023, Rakuten Mobile delivered the fastest median download speed at 51.16 Mbps.

Median Download Speed Mbps
Provider

51.16

Rakuten Mobile

47.09

NTT DoCoMo

46.90

SoftBank

46.23

au

0204060
Error bars indicate 95% CI

Fastest Providers - Upload

Calculating median upload speed for top mobile operators in Japan during Q4 2023, Rakuten Mobile had the fastest median upload speed at 20.21 Mbps.

Median Upload Speed Mbps
Provider

20.21

Rakuten Mobile

9.27

SoftBank

7.43

au

6.63

NTT DoCoMo

0102030
Error bars indicate 95% CI

Median Multi-Server Latency

Our mobile multi-server latency results in Q4 2023 showed that among top providers, SoftBank registered the lowest median multi-server latency in Japan at 43 ms.

Median Multi-Server Latency ms
Provider

43

SoftBank

51

Rakuten Mobile

52

au

59

NTT DoCoMo

0204060
Error bars indicate 95% CI

Consistency

In measuring the consistency of each operator’s performance, we found that Rakuten Mobile had the highest Consistency in Japan during Q4 2023, with 90.6% of results showing at least a 5 Mbps minimum download speed and 1 Mbps minimum upload speed.

Consistency (%)
Provider

90.6%

Rakuten Mobile

84.6%

SoftBank

82.9%

NTT DoCoMo

79.5%

au

Device Information

An analysis of performance on some of the fastest phones in Japan found that there was no statistical winner during Q4 2023.

Device Name
Manufacturer
Median
Download
Mbps
Median
Upload
Mbps
Median
Median Multi-Server Latency
ms
iPhone 15 PlusApple75.9210.7652
iPhone 15 Pro MaxApple75.2710.8451
iPhone 15 ProApple74.1710.6251
iPhone 15Apple72.2510.5351
iPhone 14Apple66.089.9350

Manufacturer Information

We examined combined performance by major cell phone manufacturers and found that there was no statistical winner in Japan during Q4 2023.

Manufacturer
Median
Download
Mbps
Median
Upload
Mbps
Median
Median Multi-Server Latency
ms
Google50.399.7249
Apple50.298.3453
Sony48.006.7554
Samsung42.957.8853
Oppo38.899.0353

Chipset Information

Looking at five of the fastest chipsets in Japan, we found that Snapdragon X70 5G had the fastest median download speed during Q4 2023 at 74.64 Mbps.

Chipset
Manufacturer
Median
Download
Mbps
Median
Upload
Mbps
Median
Median Multi-Server Latency
ms
Snapdragon X70 5GQualcomm74.6410.7451
Snapdragon X65 5GQualcomm65.799.9152
Snapdragon 8 Gen 1Qualcomm59.948.6152
Snapdragon X60 5GQualcomm59.688.6052
Tensor G2Google54.9510.1449

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