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.
Ookla Research™
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.
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 | |||
| 0 | 100 | 200 | 300 |
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.
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 | |||
| 0 | 100 | 200 | 300 |
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.
9 So-net | |||||
14 Arteria | |||||
15 BIGLOBE | |||||
15 Asahi Net | |||||
16 SoftBank | |||||
17 au | |||||
21 OCN | |||||
30 J:COM | |||||
45 SpaceX Starlink | |||||
| 0 | 10 | 20 | 30 | 40 | 50 |
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.
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.
51.16 Rakuten Mobile | |||
47.09 NTT DoCoMo | |||
46.90 SoftBank | |||
46.23 au | |||
| 0 | 20 | 40 | 60 |
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.
20.21 Rakuten Mobile | |||
9.27 SoftBank | |||
7.43 au | |||
6.63 NTT DoCoMo | |||
| 0 | 10 | 20 | 30 |
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.
43 SoftBank | |||
51 Rakuten Mobile | |||
52 au | |||
59 NTT DoCoMo | |||
| 0 | 20 | 40 | 60 |
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.
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 Plus | Apple | 75.92 | 10.76 | 52 |
| iPhone 15 Pro Max | Apple | 75.27 | 10.84 | 51 |
| iPhone 15 Pro | Apple | 74.17 | 10.62 | 51 |
| iPhone 15 | Apple | 72.25 | 10.53 | 51 |
| iPhone 14 | Apple | 66.08 | 9.93 | 50 |
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 |
|---|---|---|---|
| 50.39 | 9.72 | 49 | |
| Apple | 50.29 | 8.34 | 53 |
| Sony | 48.00 | 6.75 | 54 |
| Samsung | 42.95 | 7.88 | 53 |
| Oppo | 38.89 | 9.03 | 53 |
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 5G | Qualcomm | 74.64 | 10.74 | 51 |
| Snapdragon X65 5G | Qualcomm | 65.79 | 9.91 | 52 |
| Snapdragon 8 Gen 1 | Qualcomm | 59.94 | 8.61 | 52 |
| Snapdragon X60 5G | Qualcomm | 59.68 | 8.60 | 52 |
| Tensor G2 | 54.95 | 10.14 | 49 |
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