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 (May 2020)

	ISP	IPv6 tests count
1.	Jpne	6,512
2.	Mf-native6	6,394
3.	Ocn	5,123
4.	Bbix	4,047
5.	Internet Multifeed Co.	2,382
6.	Asahi	1,902
7.	Biglobe	1,846
8.	Japan Network Information Center	1,426
9.	Softbank BB Corp.	689
10.	Japan Network Information Center, Internet Initiative Japan Inc.	579
11.	Kddi	481
12.	So-net Entertainment Corporation	481
13.	Jupiter Telecommunication Co. Ltd	277
14.	KDDI Corporation	201
15.	Hurricane Electric LLC	147
16.	NTTDoCoMo	139
17.	K-opticom	138
18.	Choopa	98
19.	interQ	93
20.	NTT Communications Corporation	65
21.	InfoSphere	61
22.	Tokai	39
23.	Chubu Telecommunications Company, Inc.	35
24.	Zaq	29
25.	its communications Inc.	28

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, May 2020)

	ISP	Unique IPv6 addresses
1.	Jpne	3,789
2.	Mf-native6	3,362
3.	Ocn	2,958
4.	Bbix	2,392
5.	Internet Multifeed Co.	1,382
6.	Biglobe	1,088
7.	Asahi	1,069
8.	Japan Network Information Center	846
9.	Softbank BB Corp.	371
10.	Kddi	349
11.	Japan Network Information Center, Internet Initiative Japan Inc.	343
12.	So-net Entertainment Corporation	320
13.	KDDI Corporation	143
14.	K-opticom	101
15.	NTTDoCoMo	97
16.	Hurricane Electric LLC	90
17.	Jupiter Telecommunication Co. Ltd	57
18.	NTT Communications Corporation	48
19.	InfoSphere	38
20.	Choopa	34
21.	Tokai	31
22.	Chubu Telecommunications Company, Inc.	24
23.	Linode	21
24.	its communications Inc.	18
25.	Nsk	14

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 (May 2020)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	SoftEther	5	0	0.0%	5	100.0%
2.	Zdm Network Solutions Llc	5	0	0.0%	5	100.0%
3.	Mediacat	11	0	0.0%	11	100.0%
4.	Fcc	9	0	0.0%	9	100.0%
5.	Tac	6	0	0.0%	6	100.0%
6.	Chubu Telecommunications Company, Inc.	35	2	5.7%	33	94.3%
7.	its communications Inc.	28	2	7.1%	26	92.9%
8.	Sakura	25	2	8.0%	23	92.0%
9.	Community Network Center Inc.	11	1	9.1%	10	90.9%
10.	Nsk	22	2	9.1%	20	90.9%
11.	Zaq	29	3	10.3%	26	89.7%
12.	Home NOC Operators Group	9	1	11.1%	8	88.9%
13.	So-net Entertainment Corporation	481	59	12.3%	422	87.7%
14.	NTT Communications Corporation	65	8	12.3%	57	87.7%
15.	Biglobe	1,846	236	12.8%	1,610	87.2%
16.	Tokai	39	5	12.8%	34	87.2%
17.	NTTDoCoMo	139	20	14.4%	119	85.6%
18.	Jpne	6,512	959	14.7%	5,553	85.3%
19.	Japan Network Information Center	1,426	223	15.6%	1,203	84.4%
20.	Internet Multifeed Co.	2,382	383	16.1%	1,999	83.9%
21.	Ocn	5,123	829	16.2%	4,294	83.8%
22.	Asahi	1,902	339	17.8%	1,563	82.2%
23.	Bbix	4,047	724	17.9%	3,323	82.1%
24.	K-opticom	138	25	18.1%	113	81.9%
25.	interQ	93	17	18.3%	76	81.7%

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 (May 2020)

	ISP	Test count	IPv6 average
1.	Jupiter Telecommunication Co. Ltd	277	60.2 Mbps
2.	Sakura	25	51.6 Mbps
3.	Community Network Center Inc.	11	41.5 Mbps
4.	Sakura-ishikari	6	39.8 Mbps
5.	M247 Ltd	20	37.7 Mbps
6.	Choopa	98	33.7 Mbps
7.	Kir	6	30.7 Mbps
8.	Nsk	22	29.6 Mbps
9.	Zaq	29	28.5 Mbps
10.	So-net Entertainment Corporation	481	28.4 Mbps
11.	its communications Inc.	28	28.3 Mbps
12.	interQ	93	24.5 Mbps
13.	K-opticom	138	21.3 Mbps
14.	KDDI Corporation	201	21.3 Mbps
15.	Asahi	1,902	20.7 Mbps
16.	Jpne	6,512	18.7 Mbps
17.	Japan Network Information Center	1,426	18.4 Mbps
18.	Mf-native6	6,394	18.4 Mbps
19.	Internet Multifeed Co.	2,382	18.1 Mbps
20.	Bbix	4,047	17.5 Mbps
21.	Biglobe	1,846	17.0 Mbps
22.	NTTDoCoMo	139	16.3 Mbps
23.	Linode	23	16.2 Mbps
24.	Kddi	481	16.0 Mbps
25.	Ocn	5,123	14.1 Mbps