IPv6 test - Statistics for 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 2019)

	ISP	IPv6 tests count
1.	Jpne	2,389
2.	Ocn	2,336
3.	Jpne-ip6	2,021
4.	Bbix	1,637
5.	Mf-transix-e	1,573
6.	Biglobe	1,292
7.	Mf-transix-w	812
8.	Mf-native6	759
9.	Asahi	438
10.	Internet Multifeed Co.	375
11.	Japan Network Information Center	337
12.	Kddi	306
13.	SoftBank Corp.	232
14.	So-net Entertainment Corporation	223
15.	Iij	218
16.	Choopa	161
17.	Hurricane Electric LLC	115
18.	InfoSphere	104
19.	NTT Communications Corporation	83
20.	Zaq	67
21.	Linode	67
22.	Softbank BB Corp.	61
23.	M247 Ltd	52
24.	NTTDoCoMo	51
25.	K-opticom	47

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 2019)

	ISP	Unique IPv6 addresses
1.	Ocn	1,417
2.	Jpne	1,397
3.	Jpne-ip6	1,244
4.	Bbix	1,007
5.	Mf-transix-e	937
6.	Biglobe	778
7.	Mf-transix-w	481
8.	Mf-native6	400
9.	Asahi	239
10.	Internet Multifeed Co.	222
11.	Kddi	221
12.	Japan Network Information Center	181
13.	So-net Entertainment Corporation	131
14.	Iij	121
15.	SoftBank Corp.	115
16.	Hurricane Electric LLC	77
17.	InfoSphere	57
18.	Choopa	57
19.	NTT Communications Corporation	49
20.	Softbank BB Corp.	40
21.	K-opticom	37
22.	Japan Network Information Center, Internet Initiative Japan Inc.	36
23.	NTTDoCoMo	31
24.	M247 Ltd	27
25.	Hurricane Electric	21

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 2019)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	i3D.net B.V. Tokyo Japan	21	0	0.0%	21	100.0%
2.	ANEXIA Internetdienstleistungs GmbH	6	0	0.0%	6	100.0%
3.	Hurricane Electric	30	0	0.0%	30	100.0%
4.	Energia Communications	22	0	0.0%	22	100.0%
5.	Ipr	13	1	7.7%	12	92.3%
6.	Mf-native6	759	93	12.3%	666	87.7%
7.	Community Network Center Inc.	8	1	12.5%	7	87.5%
8.	Japan Network Information Center	337	46	13.6%	291	86.4%
9.	Jpne	2,389	356	14.9%	2,033	85.1%
10.	Kddi	306	46	15.0%	260	85.0%
11.	Mf-transix-e	1,573	240	15.3%	1,333	84.7%
12.	Sannet	39	6	15.4%	33	84.6%
13.	Biglobe	1,292	203	15.7%	1,089	84.3%
14.	Mf-transix-w	812	128	15.8%	684	84.2%
15.	Jpne-ip6	2,021	327	16.2%	1,694	83.8%
16.	Bbix	1,637	322	19.7%	1,315	80.3%
17.	Ocn	2,336	464	19.9%	1,872	80.1%
18.	Asahi	438	93	21.2%	345	78.8%
19.	NTT Communications Corporation	83	18	21.7%	65	78.3%
20.	SoftBank Corp.	232	53	22.8%	179	77.2%
21.	Softbank BB Corp.	61	14	23.0%	47	77.0%
22.	China Mobile communications corporation	13	3	23.1%	10	76.9%
23.	K-opticom	47	11	23.4%	36	76.6%
24.	Iij	218	55	25.2%	163	74.8%
25.	Internet Multifeed Co.	375	96	25.6%	279	74.4%

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 (Apr 2019)

	ISP	Test count	IPv6 average
1.	Jupiter Telecommunication Co. Ltd	6	103.0 Mbps
2.	Zaq	67	55.3 Mbps
3.	InfoSphere	104	53.9 Mbps
4.	Jtcl	21	51.0 Mbps
5.	interQ-JPNIC	30	43.3 Mbps
6.	Techorus	6	39.8 Mbps
7.	Energia Communications	22	32.4 Mbps
8.	Tokai	14	30.2 Mbps
9.	So-net Entertainment Corporation	223	25.1 Mbps
10.	NTT Communications Corporation	83	24.4 Mbps
11.	Chubu Telecommunications Company, Inc.	5	23.4 Mbps
12.	Ocn	2,336	23.2 Mbps
13.	K-opticom	47	22.4 Mbps
14.	Internet Multifeed Co.	375	21.6 Mbps
15.	Japan Network Information Center	337	20.1 Mbps
16.	Kddi	306	19.8 Mbps
17.	Biglobe	1,292	19.6 Mbps
18.	Mf-native6	759	18.9 Mbps
19.	Sannet	39	18.9 Mbps
20.	Asahi	438	18.7 Mbps
21.	Jpne-ip6	2,021	18.6 Mbps
22.	Jpne	2,389	18.3 Mbps
23.	Mf-transix-w	812	16.0 Mbps
24.	Mf-transix-e	1,573	15.5 Mbps
25.	Bbix	1,637	15.2 Mbps