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 (Apr 2018)

  ISP IPv6 tests count
1.Mf-transix-e16,254
2.Mf-transix-w10,714
3.Jpne-ip69,515
4.Biglobe7,260
5.Bbix6,821
6.Jpne5,808
7.Ocn5,395
8.Japan Network Information Center2,579
9.Asahi1,850
10.Kddi1,290
11.Sbb1,172
12.Iij802
13.Hurricane Electric581
14.Choopa517
15.Plala414
16.Linode274
17.NTTDoCoMo270
18.InfoSphere263
19.Apnic Portables8216
20.interQ179
21.Jtcl158
22.Zaq126
23.So-net Entertainment Corporation110
24.Tokai103
25.Commufa94

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, Apr 2018)

  ISP Unique IPv6 addresses
1.Mf-transix-e8,189
2.Mf-transix-w5,801
3.Jpne-ip65,450
4.Bbix4,126
5.Biglobe4,084
6.Jpne3,411
7.Ocn2,984
8.Japan Network Information Center1,495
9.Asahi1,042
10.Kddi885
11.Sbb730
12.Iij541
13.Hurricane Electric292
14.Plala238
15.Choopa191
16.NTTDoCoMo181
17.Apnic Portables8154
18.InfoSphere136
19.Linode108
20.So-net Entertainment Corporation73
21.K-opticom68
22.Tokai65
23.Commufa60
24.interQ58
25.Jtcl57

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 (Apr 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Energia Communications, Inc.500.0%5100.0%
2.Sinet500.0%5100.0%
3.Hinet3700.0%37100.0%
4.Ssd3213.1%3196.9%
5.Zdm Network Solutions Llc4524.4%4395.6%
6.STNet1218.3%1191.7%
7.Zaq126118.7%11591.3%
8.Apnic Portables8216209.3%19690.7%
9.Wolflab8112.5%787.5%
10.NTTDoCoMo2703613.3%23486.7%
11.Jpne-ip69,5151,27913.4%8,23686.6%
12.Jpne5,80879913.8%5,00986.2%
13.Keio-sfc7114.3%685.7%
14.Biglobe7,2601,13515.6%6,12584.4%
15.Cttnet6116.7%583.3%
16.Mf-transix-w10,7141,93018.0%8,78482.0%
17.Bbix6,8211,25118.3%5,57081.7%
18.Asahi1,85035219.0%1,49881.0%
19.Kddi1,29024919.3%1,04180.7%
20.Commufa941920.2%7579.8%
21.Mf-transix-e16,2543,36320.7%12,89179.3%
22.Japan Network Information Center2,57955121.4%2,02878.6%
23.Multifeed9222.2%777.8%
24.Ipr27622.2%2177.8%
25.Hurricane Electric LLC26623.1%2076.9%

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 (Apr 2018)

  ISP Test count IPv6 average
1.Cttnet6151.0 Mbps
2.Zaq126104.6 Mbps
3.Bbix6,82159.7 Mbps
4.So-net Entertainment Corporation11058.7 Mbps
5.Commufa9456.6 Mbps
6.K-opticom9151.6 Mbps
7.Plala41449.2 Mbps
8.Jtcl15848.8 Mbps
9.InfoSphere26343.8 Mbps
10.Asahi1,85042.5 Mbps
11.Linode27442.0 Mbps
12.Tokai10341.3 Mbps
13.Biglobe7,26038.8 Mbps
14.Jpne-ip69,51538.3 Mbps
15.Kddi1,29038.3 Mbps
16.Mf-transix-e16,25434.6 Mbps
17.Ocn5,39534.5 Mbps
18.Jpne5,80833.5 Mbps
19.interQ17933.5 Mbps
20.STNet1227.7 Mbps
21.Kir1926.9 Mbps
22.Tdnc1826.7 Mbps
23.Sannet4725.9 Mbps
24.Mf-transix-w10,71425.1 Mbps
25.Japan Network Information Center2,57924.2 Mbps