Japan IPv6 in Japan

These graphs show the evolution of default protocol, v6 address types, and average bandwidth in Japan over time.

They are generated using the data collected by the ipv6-test.com connection test page, and are updated on a monthly basis.

Overall IPv6 and v4 protocol support in Japan

This graph shows the evolution of IPv6 support vs IPv4 for all our connection test.

The numbers are percentages, so we can expect almost 100% of hosts supporting IPv4 with a slow growth for IPv6.

Top 25 internet service providers for IPv6 in Japan (May 2017)

  ISP IPv6 tests count
1.Jpne-ip67,134
2.Jpne6,087
3.Mf-transix-e5,208
4.Bbix4,855
5.Mf-transix-w3,732
6.Asahi3,006
7.Ocn3,005
8.Japan Network Information Center2,876
9.Sbb1,326
10.Kddi1,037
11.Mf-native61,006
12.Hurricane Electric967
13.InfoSphere685
14.Iij577
15.NTTDoCoMo558
16.Mf-native6-w526
17.Choopa410
18.interQ310
19.Zaq308
20.Iijnet271
21.Bbtec253
22.Jtcl225
23.Linode216
24.Biglobe209
25.K-opticom116

IPv6 and v4 protocol support in Japan (unique addresses)

This graph shows the evolution of IPv6 support vs IPv4 for unique users of our connection test.

The numbers are percentages, so we can expect a slow growth towards 50% v4 / 50% v6.

Top 25 internet service providers for IPv6 in Japan (unique addresses, May 2017)

  ISP Unique IPv6 addresses
1.Jpne-ip63,861
2.Jpne3,545
3.Bbix2,925
4.Mf-transix-e2,752
5.Mf-transix-w2,056
6.Ocn1,797
7.Japan Network Information Center1,679
8.Asahi1,646
9.Sbb794
10.Kddi702
11.Mf-native6530
12.NTTDoCoMo477
13.Hurricane Electric423
14.Iij393
15.Mf-native6-w321
16.InfoSphere285
17.Iijnet198
18.Choopa197
19.Bbtec127
20.Biglobe127
21.Linode84
22.Jtcl76
23.Apnic Portables876
24.K-opticom70
25.interQ61

Default browser protocol in Japan

This graph shows the percentage of browsers that default to IPv6 vs. IPv4 when visiting the ipv6-test connection test.

Hopefully, in the not so distant future, the v6 part will grow taller than the v4 one.

Default browser protocol in Japan (dual-stack users)

This graph shows the percentage of browsers that default to IPv6 vs. IPv4 for users that have both v4 and v6 connectivity.

Usually a system will default to v6 when it's available, but in some cases with tunneled connections, v4 stays the default.

Top 25 internet service providers for IPv6 default in Japan (May 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Wi2600.0%6100.0%
2.NTTDoCoMo558427.5%51692.5%
3.Ssd1317.7%1292.3%
4.Tamatele1218.3%1191.7%
5.Sannet38410.5%3489.5%
6.Ibaraki-u41512.2%3687.8%
7.Jpne6,08788014.5%5,20785.5%
8.Ipr13215.4%1184.6%
9.Bbix4,85580116.5%4,05483.5%
10.Jpne-ip67,1341,19716.8%5,93783.2%
11.Zaq3085216.9%25683.1%
12.Apnic Portables8961717.7%7982.3%
13.Mf-transix-w3,73274119.9%2,99180.1%
14.Cisco Systems5120.0%480.0%
15.Fruits-netv635720.0%2880.0%
16.Kddi1,03720920.2%82879.8%
17.Mf-transix-e5,2081,17322.5%4,03577.5%
18.Mf-native6-w52612323.4%40376.6%
19.Iij57713723.7%44076.3%
20.Iijnet2716524.0%20676.0%
21.K-opticom1162925.0%8775.0%
22.Sbb1,32634926.3%97773.7%
23.Commufa631727.0%4673.0%
24.Mf-native61,00627727.5%72972.5%
25.Tokai722027.8%5272.2%

IPv6 address types in Japan

Here you can see the evolution of address types over time, and measure usage of 6to4 and Teredo tunneled connectivity.

It should be noted that because 6rd works with native addresses, it cannot be detected here as tunneled. This is also the case with VPN based tunnels.

Downstream bandwidth in Japan

This graph illustrates the connection speed gap between IPv4 and IPv6, numbers represent v6 speed as percentage of v4 speed.

The lower IPv6 speeds are often caused by tunneling overhead or insufficient v6 connectivity or peering capacity at ISPs.

Top 25 internet service providers for IPv6 speed in Japan (May 2017)

  ISP Test count IPv6 average
1.Fbdc573.1 Mbps
2.Multifeed6047.2 Mbps
3.Mf-native6-w52642.9 Mbps
4.Open Computer Network538.8 Mbps
5.Cwidc938.5 Mbps
6.Mf-transix-e5,20838.3 Mbps
7.K-opticom11638.2 Mbps
8.Asahi3,00636.5 Mbps
9.Jpne6,08732.4 Mbps
10.Mf-transix-w3,73230.7 Mbps
11.Jpne-ip67,13430.6 Mbps
12.Mf-native61,00629.4 Mbps
13.Cttnet1929.0 Mbps
14.Ocn3,00528.1 Mbps
15.Biglobe20927.9 Mbps
16.Jtcl22527.2 Mbps
17.InfoWeb(Fujitsu Ltd.)727.1 Mbps
18.Japan Network Information Center2,87625.3 Mbps
19.Zaq30825.2 Mbps
20.Kddi1,03724.0 Mbps
21.NTTDoCoMo55823.7 Mbps
22.InfoSphere68523.7 Mbps
23.Tdnc3321.9 Mbps
24.interQ31020.6 Mbps
25.Bbix4,85519.0 Mbps