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 2018)

  ISP IPv6 tests count
1.Jpne-ip63,766
2.Mf-transix-e3,151
3.Ocn2,487
4.Biglobe2,280
5.Jpne2,144
6.Bbix2,042
7.Mf-transix-w1,835
8.Asahi496
9.Japan Network Information Center489
10.Kddi386
11.Iij357
12.Choopa288
13.So-net Entertainment Corporation251
14.SoftBank Corp.202
15.NTT Communications Corporation141
16.InfoSphere140
17.Hurricane Electric LLC121
18.Linode118
19.NTTDoCoMo65
20.Hurricane Electric59
21.University of Tsukuba, Sangaku Renkei Kenkyukai58
22.interQ-JPNIC58
23.K-opticom58
24.Jtcl47
25.China Mobile45

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 2018)

  ISP Unique IPv6 addresses
1.Jpne-ip62,258
2.Mf-transix-e1,961
3.Ocn1,528
4.Jpne1,333
5.Biglobe1,263
6.Bbix1,254
7.Mf-transix-w1,142
8.Asahi302
9.Japan Network Information Center284
10.Kddi247
11.Iij231
12.So-net Entertainment Corporation175
13.Choopa134
14.SoftBank Corp.128
15.NTT Communications Corporation87
16.InfoSphere74
17.Hurricane Electric LLC66
18.Linode56
19.NTTDoCoMo47
20.Hurricane Electric42
21.K-opticom36
22.University of Tsukuba, Sangaku Renkei Kenkyukai33
23.China Mobile28
24.Commufa24
25.interQ-JPNIC24

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 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Sakura1600.0%16100.0%
2.Multifeed600.0%6100.0%
3.Fbdc600.0%6100.0%
4.Community Network Center Inc.17211.8%1588.2%
5.CT Networks24312.5%2187.5%
6.Kagawa T.V Broadcast Network Co, .Ltd39512.8%3487.2%
7.Mf-transix-e3,15142313.4%2,72886.6%
8.Jupiter Telecommunication Co. Ltd7114.3%685.7%
9.Jpne-ip63,76656615.0%3,20085.0%
10.Jpne2,14432915.3%1,81584.7%
11.incl13215.4%1184.6%
12.Bbix2,04232916.1%1,71383.9%
13.Japan Network Information Center4898016.4%40983.6%
14.Mf-transix-w1,83530716.7%1,52883.3%
15.Hurricane Electric591016.9%4983.1%
16.Biglobe2,28038817.0%1,89283.0%
17.Kddi3867018.1%31681.9%
18.Internet Initiative Japan Inc.5120.0%480.0%
19.Ocn2,48752421.1%1,96378.9%
20.NTT Communications Corporation1413021.3%11178.7%
21.Zaq16425.0%1275.0%
22.StarHub-Ltd-NGNBN-Services23626.1%1773.9%
23.Commufa30826.7%2273.3%
24.Jtcl471327.7%3472.3%
25.Tokai351028.6%2571.4%

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 2018)

  ISP Test count IPv6 average
1.Multifeed678.3 Mbps
2.Nct669.3 Mbps
3.Zaq1658.6 Mbps
4.its communications Inc.1157.8 Mbps
5.Fbdc642.9 Mbps
6.So-net Entertainment Corporation25139.4 Mbps
7.interQ-JPNIC5834.9 Mbps
8.Kddi38634.1 Mbps
9.Jtcl4733.2 Mbps
10.Linode11831.2 Mbps
11.Kagawa T.V Broadcast Network Co, .Ltd3927.3 Mbps
12.incl1327.2 Mbps
13.Kintetsu Cable Network Co., Ltd.1425.7 Mbps
14.Hurricane Electric5923.6 Mbps
15.M247 Ltd3218.1 Mbps
16.Iij35717.6 Mbps
17.Mf-transix-e3,15115.8 Mbps
18.Mf-transix-w1,83513.0 Mbps
19.InfoSphere14013.0 Mbps
20.Japan Network Information Center48912.2 Mbps
21.Bbix2,04212.2 Mbps
22.Jpne-ip63,76611.9 Mbps
23.Biglobe2,28011.0 Mbps
24.Choopa28810.6 Mbps
25.K-opticom5810.5 Mbps