July 19, 2024

Barometer of fixedInternet connections inJapan
2023/07/01 – 2024/06/30/Agenda

Introducing
nPerf

Methodology

Executivesummary

Analysis

nPerf Network
assesment

fixed Internet - 07/01/2023 - 06/30/2024 - Japan2

Test your connection
on nPerf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan

3

2. Executive Summary

The subscribers of So-net enjoyed the best fixed Internet performances in Japan during 2024.

Fixed Internet connections in Japan

J:COM

2023/07/01 - 2024/06/30

NTTSo-net

SoftBank

au one net

Download bitrates (Mb/s)

231.89132.66308.93121.35171.12

Upload bitrates (Mb/s)

54.18

175.59332.97136.13

192.77

Latency (ms)

23.88

25.69

18.45

27.57

26.10

Web browsing (%)

75.14

69.99

71.75

74.19

72.56

Youtube streaming (%)

87.42

83.41

81.97

86.65

86.76

nPerf Score (nPoints)

Best ﬁxed Internet performancein 2024

Source : nperf.com-----

120 134

112 633

131 640

114 253

120 509

Source : nperf.com

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan4

3. Analysis
Introduction

SoftBank: remarkable streaming performance

In Japan's telecommunications market, So-net holds the leading position,
followed by au one net in second place, J:COM in third, SoftBank in fourth, andNTT in last. This ranking highlights the diverse strengths and performancelevels of each internet service provider (ISP) across key metrics such aslatency, download and upload speeds, web browsing, and YouTube streaming.

SoftBank occupies the fourth position, with remarkable scores instreaming. While not leading in any single category, SoftBank provides
reliable streaming services that can meet the needs of many users.

So-net leads with superior speed and latencyIn the last position, NTT significantly trails its competitors with an averagescore of 112633 nPoints. NTT's performance does not allow it to compete
effectively in the Japanese telecommunications market, impacting its
appeal to users.

So-net stands out as the undisputed leader, excelling in download speed(308.93 Mbps), upload speed (332.97 Mbps), and latency (18.45 ms). These
impressive metrics ensure a top-tier internet experience, placing So-net firmly
at the top of the market.
au one net: strong performance in streaming and speed
au one net secures the second position with strong performance in YouTube
streaming (86.76) and solid download and upload speeds. This makes au one
net a competitive option for users prioritizing high-quality streaming andreliable speeds.
J:COM: excellent in web browsing and streaming

NTT: lagging behindConclusion
The Japanese telecommunications market is led by So-net, thanks to its
superior download and upload speeds and low latency. au one net follows
in second place with strong streaming and speed performance. J:COMranks third, excelling in web browsing and YouTube streaming. SoftBank,in fourth place, offers reliable streaming services, while NTT lags behind in
the last position. This competitive landscape provides users with various
options based on their specific needs, whether they prioritize speed,
streaming quality, or overall reliability.

J:COM holds the third position, excelling particularly in web browsing (75.14)
and YouTube streaming (87.42). These strengths highlight J:COM's capability
to provide a smooth and efficient online experience for its users.

fixed Internet - 07/01/2023 - 06/30/2024 - Japan5

4. Methodology
Statistical precision is crucial in accurately determining winners. At nPerf,
we prioritize test quality, precise reporting, and transparency. Analyzing alarge volume of tests in this study, we've achieved 1.6% precision for
absolute values, highlighting the reliability and accuracy of our data.

We assess:

For a more comprehensive understanding of the user experience, ourreport features test results during both Busy hours (6 PM to 11 PM) andIdle hours (the rest of the day). Busy hours, marked by network strain, canimpact user experience through congestion. This approach helps inunderstanding how network performance ﬂuctuates throughout the day.
We only include national Internet service providers with test share above
5% share. The chart below shows the overall test distribution for eachservice provider.

Overall distribution of the tests per provider (ISPs Share)
8%
J:COM

34%
25%

NTTSo-net
SoftBank

21%

12%

au one net

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan

6Quality of Experience : Browsing

Browsing Performance rate (average)
J:COM

75,14 %

NTT

69,99 %The subscribers of J:COM and SoftBank enjoyed the best mobile Internet browsing
performance in 2024.

Browsing Performance results ventilation (average)
Slow (5-10s)

J:COM
So-net3%

Correct (2-5s)
48%

Excellent (0-2s)
49%

71,75 %SoftBank

74,19 %

au one net

72,56 %

NTT

7%

48%

44%

So-net

10%

44%

46%

SoftBank5%

au one net

7%

49%

46%

50%

43%
Source : nperf.com

Source : nperf.com

Browsing Performance rate (average)

Browsing performance rate (average) evolution over the year
Idle Time

Busy Time
75,39 %

J:COM

75,06 %

J:COM

70,57 %

NTT

69,78 %

NTT

77,41 %

So-net69,59 %

So-net

74,84 %SoftBank

73,94 %SoftBank

72,88 %

au one net

72,45 %
Source : nperf.com

au one net
2023-072023-082023-092023-102023-112023-122024-012024-022024-032024-042024-052024-06

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan

7Quality of Experience : Streaming

Streaming Performance rate (average)
J:COM

87,42 %

NTT

83,41 %The subscribers of J:COM, SoftBank and au one net enjoyed the best mobile Internet streaming
performance in 2024.

Streaming Performance results ventilation (average)
Slow (5-10s)

J:COM
So-netCorrect (2-5s)

2%3%

Excellent (0-2s)

96%

81,97 %SoftBankNTT

5% 3%

So-net9%

SoftBank

2%2%

96%

au one net

3% 3%

94%

86,65 %

au one net

86,76 %

91%

5%

86%

Source : nperf.com

Streaming Performance rate (average)
Busy Time

Source : nperf.com

Streaming performance rate (average) evolution over the year
Idle Time

86,84 %

J:COM

87,62 %

J:COM

83,87 %

NTT

83,25 %

NTT

87,66 %

So-net

79,86 %

So-net86,81 %SoftBank

86,59 %SoftBank

86,08 %

au one net

86,98 %
Source : nperf.com

au one net
2023-072023-082023-092023-102023-112023-122024-012024-022024-032024-042024-052024-06

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan

8Speed : Download

Download Speed (average)
J:COMThe subscribers of So-net enjoyed the best average mobile Internet download speed in2024.

231,89 Mb/s

NTT

Download Speed results ventilation (average)

132,66 Mb/s

Low (0-10 Mb/s)

So-net

J:COM

4% 4%

NTT

8%

So-net5%

Correct (10-25 Mb/s)

Excellent (25+ Mb/s)

92%

308,93 Mb/s

SoftBank

121,35 Mb/s

au one net

171,12 Mb/s

9%

83%

6%

SoftBank

10%

au one net

8%

89%

11%

79%

9%

84%

Source : nperf.com

Download Speed (average)

Download Speed evolution over the year (average)

Busy Time
246,87 Mb/s
114,60 Mb/s
324,99 Mb/s

Source : nperf.com

Idle Time

J:COM

225,24 Mb/s

J:COMNTT

139,59 Mb/s

NTTSo-net

So-net302,40 Mb/s

122,70 Mb/s

SoftBank

120,80 Mb/s

162,70 Mb/s

au one net

174,76 Mb/s

SoftBank
au one net
Source : nperf.com

2023-072023-082023-092023-102023-112023-122024-012024-022024-032024-042024-052024-06

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan9Speed : Upload

Upload Speed (average )The subscribers of So-net enjoyed the best average mobile Internet upload speed in 2024.
J:COM

54,18 Mb/sNTT

Upload Speed results ventilation (average)

175,59 Mb/s

Low (0-5 Mb/s)
56%

J:COM
So-netCorrect (5-10 Mb/s)

Excellent (10+ Mb/s)

3%

41%

332,97 Mb/s

SoftBank

136,13 Mb/s

NTT

8%

So-net7%

7%

5%

SoftBank

au one net

192,77 Mb/s

85%

87%

30%

au one net

21%

11%

59%

9%

70%
Source : nperf.com

Source : nperf.com

Upload Speed (average )Upload Speed evolution over the year (average)

Busy Time
57,41 Mb/s
171,47 Mb/s
351,62 Mb/s

Idle Time

J:COMNTT
So-net

J:COM

52,75 Mb/s

NTT

177,17 Mb/s

So-net325,39 Mb/s

152,74 Mb/s

SoftBank

129,31 Mb/s

198,78 Mb/s

au one net

190,18 Mb/s

SoftBank
au one net
Source : nperf.com

2023-072023-082023-092023-102023-112023-122024-012024-022024-032024-042024-052024-06

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan10

Speed : Latency

Latency Speed (average)

The subscribers of So-net enjoyed the best average mobile Internet latency speed in 2024.

J:COM

23,88 ms

NTT

25,69 ms

Latency Speed results ventilation (average)
Slow (5-10s)

So-netCorrect (30-100 ms)

10%

Excellent (0-30 ms)

J:COM

2%

88%

NTT

2%

So-net2%

SoftBank

2%

25%

73%

au one net

2%

27%

71%

18,45 ms

SoftBank

27,57 ms

au one net

26,10 ms

17%

81%

8%

90%

Source : nperf.com

Source : nperf.com

Latency Speed (average)

Latency Speed evolution over the year (average)
Idle Time

Busy Time
22,40 ms
25,77 ms
18,94 ms

J:COM24,54 ms

J:COMNTT

25,66 ms

NTTSo-net

So-net18,26 ms

26,65 ms

SoftBank

27,95 ms

25,82 ms

au one net

26,23 ms
Source : nperf.com

SoftBank
au one net
2023-072023-082023-092023-102023-112023-122024-012024-022024-032024-042024-052024-06

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan11

Fixed Internet performance in Japan

nPerf Score (nPoints)
J:COMNTT

The subscribers of So-net enjoyed the best fixed Internet performances in Japan during 2024.
120 134

112 633

So-net131 640

The nPerf score takes into account the measured bitrates, the latency and the QoE tests.
The value of the points for the rates and the latency is calculated on a logarithmic scale,

SoftBank

114 253

to better represent the perception of the user.
Thus, this score reﬂects the overall quality of the connection experienced by the user.

au one net

120 509
Source : nperf.com

Source : nperf.com

nPerf score evolution over the year (average)
J:COM
Best ﬁxed Internet performancein 2024

NTTSo-net
SoftBank
au one net
Source : nperf.com

2023-072023-082023-092023-102023-112023-122024-012024-022024-03

2024-042024-052024-06

Source : nperf.com

fixed Internet - 07/01/2023 - 06/30/2024 - Japan12