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 (Sep 2017)

  ISP IPv6 tests count
1.Mf-transix-e11,389
2.Mf-transix-w8,284
3.Jpne-ip66,453
4.Biglobe5,414
5.Kddi4,832
6.Jpne4,750
7.Bbix4,505
8.Ocn2,772
9.Japan Network Information Center2,682
10.Asahi1,742
11.Sbb1,151
12.Hurricane Electric700
13.Iij516
14.Choopa429
15.Linode308
16.InfoSphere303
17.Plala271
18.Bbtec251
19.interQ239
20.Apnic Portables8233
21.Iijnet197
22.NTTDoCoMo189
23.Mf-native6-e143
24.Tokai133
25.K-opticom126

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, Sep 2017)

  ISP Unique IPv6 addresses
1.Mf-transix-e6,100
2.Mf-transix-w4,634
3.Jpne-ip63,693
4.Bbix2,876
5.Biglobe2,776
6.Jpne2,759
7.Ocn1,735
8.Japan Network Information Center1,700
9.Asahi1,100
10.Kddi806
11.Sbb744
12.Hurricane Electric345
13.Iij329
14.Choopa180
15.Plala180
16.InfoSphere174
17.Iijnet149
18.Apnic Portables8145
19.Bbtec130
20.NTTDoCoMo124
21.Linode117
22.Mf-native6-e94
23.Infoweb87
24.Tokai74
25.K-opticom71

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 (Sep 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Amazon500.0%5100.0%
2.Multifeed500.0%5100.0%
3.WIDE Project1000.0%10100.0%
4.Ibaraki-u600.0%6100.0%
5.Bit-drive500.0%5100.0%
6.Utnet800.0%8100.0%
7.Ultina4100.0%41100.0%
8.Ssd2414.2%2395.8%
9.Ipr1815.6%1794.4%
10.Apnic Portables8233166.9%21793.1%
11.Kddi4,8323647.5%4,46892.5%
12.Jpne4,7504028.5%4,34891.5%
13.Jpne-ip66,4536159.5%5,83890.5%
14.Sinet19210.5%1789.5%
15.NTTDoCoMo1892312.2%16687.8%
16.Biglobe5,41468812.7%4,72687.3%
17.Bbix4,50566814.8%3,83785.2%
18.Mf-transix-w8,2841,34816.3%6,93683.7%
19.Mf-transix-e11,3891,98617.4%9,40382.6%
20.Cttnet11218.2%981.8%
21.Jpnic5120.0%480.0%
22.Nato Research Ltd.5120.0%480.0%
23.STNet10220.0%880.0%
24.Sannet15320.0%1280.0%
25.Iijnet1974020.3%15779.7%

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 (Sep 2017)

  ISP Test count IPv6 average
1.Google Inc.7362.1 Mbps
2.Mediacat11109.4 Mbps
3.Jtcl10553.4 Mbps
4.Fbdc1145.1 Mbps
5.Utnet837.8 Mbps
6.Commufa8137.7 Mbps
7.K-opticom12637.0 Mbps
8.Zaq5537.0 Mbps
9.Sannet1536.3 Mbps
10.Mf-transix-e11,38935.7 Mbps
11.Cat735.0 Mbps
12.Asahi1,74234.5 Mbps
13.Ocn2,77234.4 Mbps
14.Jpne-ip66,45334.2 Mbps
15.Kddi4,83234.0 Mbps
16.Plala27132.1 Mbps
17.Jpne4,75030.6 Mbps
18.Mf-transix-w8,28429.9 Mbps
19.Biglobe5,41429.4 Mbps
20.Bbix4,50527.6 Mbps
21.Tokai13323.0 Mbps
22.InfoSphere30322.5 Mbps
23.interQ23921.8 Mbps
24.STNet1021.4 Mbps
25.Japan Network Information Center2,68221.2 Mbps