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 (Jul 2019)

  ISP IPv6 tests count
1.Jpne4,053
2.Mf-native63,093
3.Ocn2,557
4.Bbix1,761
5.Biglobe1,653
6.Internet Multifeed Co.1,089
7.So-net Entertainment Corporation411
8.Asahi350
9.Kddi342
10.Softbank BB Corp.296
11.Japan Network Information Center, Internet Initiative Japan Inc.268
12.Japan Network Information Center211
13.Choopa165
14.NTT Communications Corporation93
15.Hurricane Electric LLC73
16.InfoSphere70
17.K-opticom68
18.NTTDoCoMo59
19.KDDI Corporation53
20.i3D.net B.V. Tokyo Japan52
21.Jupiter Telecommunication Co. Ltd47
22.interQ45
23.Linode36
24.Zaq33
25.Chubu Telecommunications Company, Inc.32

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, Jul 2019)

  ISP Unique IPv6 addresses
1.Jpne2,500
2.Ocn1,588
3.Mf-native61,584
4.Biglobe1,044
5.Bbix933
6.Internet Multifeed Co.666
7.Asahi229
8.Kddi215
9.So-net Entertainment Corporation209
10.Softbank BB Corp.183
11.Japan Network Information Center, Internet Initiative Japan Inc.169
12.Japan Network Information Center136
13.Choopa61
14.Hurricane Electric LLC52
15.InfoSphere52
16.K-opticom51
17.NTT Communications Corporation50
18.NTTDoCoMo41
19.Chubu Telecommunications Company, Inc.23
20.Linode23
21.Jupiter Telecommunication Co. Ltd20
22.Cat Networks K.K.16
23.M247 Ltd16
24.xTom Limited15
25.interQ15

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 (Jul 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Mnet1400.0%14100.0%
2.Hokuden Information System Service Co., Ltd.500.0%5100.0%
3.its communications Inc.900.0%9100.0%
4.Sinet800.0%8100.0%
5.Ssd500.0%5100.0%
6.Energia Communications500.0%5100.0%
7.Zdm Network Solutions Llc1300.0%13100.0%
8.Research Organization of Information and Systems, National Institute of Informa500.0%5100.0%
9.i3D.net B.V. Tokyo Japan5211.9%5198.1%
10.Tokai9111.1%888.9%
11.NTT Communications Corporation931212.9%8187.1%
12.Jpne4,05355613.7%3,49786.3%
13.Kddi3424914.3%29385.7%
14.Biglobe1,65324014.5%1,41385.5%
15.K-opticom681014.7%5885.3%
16.Sakura27414.8%2385.2%
17.Chubu Telecommunications Company, Inc.32515.6%2784.4%
18.Bbix1,76128516.2%1,47683.8%
19.Mf-native63,09354417.6%2,54982.4%
20.Zaq33618.2%2781.8%
21.Choopa, LLC11218.2%981.8%
22.Ocn2,55747118.4%2,08681.6%
23.Internet Multifeed Co.1,08920318.6%88681.4%
24.NTTDoCoMo591118.6%4881.4%
25.Jupiter Telecommunication Co. Ltd47919.1%3880.9%

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 (Jul 2019)

  ISP Test count IPv6 average
1.Jupiter Telecommunication Co. Ltd4769.7 Mbps
2.Zaq3367.5 Mbps
3.Kir2662.1 Mbps
4.Hokuden Information System Service Co., Ltd.543.0 Mbps
5.Sinet841.5 Mbps
6.Chubu Telecommunications Company, Inc.3237.1 Mbps
7.Amazon Technologies Inc1636.9 Mbps
8.Choopa, LLC1133.5 Mbps
9.NTT Communications Corporation9330.7 Mbps
10.Jpne4,05324.1 Mbps
11.Ocn2,55723.9 Mbps
12.Japan Network Information Center21122.5 Mbps
13.Hurricane Electric LLC7322.0 Mbps
14.M247 Ltd2921.2 Mbps
15.Biglobe1,65320.3 Mbps
16.So-net Entertainment Corporation41120.2 Mbps
17.Bbix1,76120.1 Mbps
18.Asahi35019.4 Mbps
19.Mf-native63,09318.7 Mbps
20.Internet Multifeed Co.1,08913.9 Mbps
21.K-opticom6813.7 Mbps
22.interQ4513.5 Mbps
23.Japan Network Information Center, Internet Initiative Japan Inc.26812.9 Mbps
24.Kddi34210.2 Mbps
25.InfoSphere709.9 Mbps