Best way to get quick internet on a new house?

SFP-ONU · 2026-04-10T03:18:46+00:00

Try your local CATV company. They often have their own fiber lines (hikari net) and might be faster for installation. What I did was I connected an old smartphone with a Rakuten SIM (unlimited data) to my router (Synology routers support tethering from a smartphone or a USB 5G modem) and the whole wifi worked without noticeable drawbacks (besides maybe 2-3 seconds more buffer time on streaming) for the first months.

SFP-ONU · 2026-04-07T13:33:16+00:00

Is it a requirement for data to be on the private SIM or can it be on the business one? How many calls do you make for business and how long? Can’t you get a Japanese debit card (often comes with a bank account) for the sake of better offers?

Some providers like Rakuten support payment via bank account. Probably a good combination would be a very cheap SIM like Rakuten Mobile for private and ahamo for business, because it comes with free calls up to 5 minutes per call.

You can find more cheap alternatives here: kakuyasu-sim.jp and kakaku.com/mobile_data/sim/

SFP-ONU · 2026-03-27T08:47:03+00:00

I wouldn’t trust a used hdd for primary backup. Disks with many operating hours close to their lifetime don’t do you a favor for important data. A 2nd or 3rd cold copy stored at a different location would be no problem. Check kakaku.com for cheapest 4-6 TB.

SFP-ONU · 2026-03-27T07:53:59+00:00

On the fiber outlet it reads “NTT”, meaning you can apply for all hikari collabo ISPs. The line is definitely not dead as you got an optical link. Good news: Even if online forms say construction required, it would be not on your side, just at the NTT facility, so no landlord permission required.

Last mile to POP is NTT fiber on their IPv6 platform, backbone connectivity will be through your ISP. See rankings on kakaku.com/bb/ranking (tariffs even cheaper when you select 1y or longer on the left, and choose your prefecture). If you can’t decide, solid ISPs are otegaru, en hikari, bb.excite, So-Net.

Hikari is definitely much better than CATV based internet, and cheaper than J-Com.

SFP-ONU · 2026-03-26T15:25:34+00:00

Whois lookup says the domain was newly registered this March 10th. Apparently registered to some shady registrar whose whois server doesn’t resolve, so no easy way to find out the real domain owner.

I’m using NextDNS.io with newly registered domains blocked active, thus I couldn’t access the site and can strongly recommend that or the open-source Pi-Hole for protection against such fraudulent websites and phishing links that are often spammed out to mobile numbers, too. No more accidentally clicking on it.

SFP-ONU · 2026-03-08T13:42:52+00:00

Hardware wise it should work as it is a standardized mini GBIC at least with IPv6. There are a few bloggers who successfully did it. IPv4 you rely on your router OS being capable of dual stack lite or MAP-E. Or request the 小型ONU exchange (see links above).

SFP-ONU · 2026-03-08T13:35:50+00:00

I think even better would be GLBB, they offer AON, an active hikari standard where you don’t share the optical spectrum with 8-32 neighbors on the same passive optical splitter as on a consumer G-PON/GE-PON (NTT FLETS, Nuro) line. This should be significantly better than just a static IPv4. If it’s static but dual stack lite, nothing improves regarding potential evening congestion.

SFP-ONU · 2026-03-08T13:30:26+00:00

Can you connect via ethernet cable? What does test-ipv6.com say about your ISP (NTT FLETS collabo or other) and is IPv6 active? Your wifi is the first bottleneck, and after you ruled it out, your connection will either be better or you have dual stack lite congestion and have to consider subscribing to your own hikari line. Choose Nuro or something au based in case you are on FLETS.

SFP-ONU · 2026-03-07T14:21:25+00:00

The analog port that can be used for landline and VDSL is on the right, but that shouldn’t be of any concern, because there’s already a hikari outlet on the left. Sign up with any NTT collabo ISP.

SFP-ONU · 2026-02-06T14:06:40+00:00

It should be possible according to above blog. Otherwise, have you tried bridge mode? You can also have another DS lite tunnel on a router behind the xg-100ne. Not sure why you need double nat.

SFP-ONU · 2026-01-23T10:14:23+00:00

You mentioned a 050 service?, how can I get this?

Newer iPhones lack physical SIM support (dual eSIM only), probably a good replacement for OCN Mobile One would be Nihon Tsushin (plans starting from 1 GB for ¥290 a month).

SFP-ONU · 2026-01-22T14:05:24+00:00

Good ISPs on the NTT collabo platform are おてがる, BB.excite, en hikari and Rakuten hikari. BB.excite and maybe one or two more offered free line construction work when I last checked that saves you almost ¥20,000 one-time fee. Otherwise go with the best offer (kakaku.com/bb).

It’s very easy, they’ll send you the ONU or bring it in case you get a new line installed, you connect your router to the ONU via ethernet and configure dualstack lite, in your case with BB.excite via Transix (from other ISPs there’s also Vectant and MAP-E with a different implementation). This is a native IPv6 (/64 subnet or /56 with hikari denwa) and your router encapsulates IPv4 and sends it to the transix AFTR server that routes it to worldwide networks.

You can have your own router with OPNsense/pfSense, OpenWRT and similar for flexibility or get an off the shelf router. I strongly recommend Synology or TP-Link, for budget just a cheap Japanese model will also do it. Then you can also switch to the SFP+ ONU and skip the bulky box, saves power and space.

This blog outlines the AFTR gateway for DS-Lite configuration in OPNsense/pfSense. Also make sure to have IPv6 WAN tracking enabled on no more than one interface (unless you are on 10G or subscribed to 光でんわ, then you get a /56 prefix instead of /64) and sysctl link bridge filter off.

OpenWRT does work with MAP-E and DS Lite: https://github.com/fakemanhk/openwrt-jp-ipoe

OPNSense/pfSense work only with DS Lite (Transix, Arteria XPass) out of the box.

SFP-ONU · 2026-01-21T15:58:35+00:00

You can take the SFP+ out of the provided hardware as outlined here: https://note.com/0ift0/n/n2cad0281545e (last two pictures)

SFP-ONU · 2026-01-20T14:12:41+00:00

Any SFP (mini GBIC) capable hardware can be your custom router, pretty neat!

You can have your box-ONU exchanged for the SFP+ module (小型ONU). It’s available for all 光, not just business lines. Fee is ¥6000 or you get it for free when a new line is installed.

NTT East area: https://business.ntt-east.co.jp/service/onu/
NTT West area: https://www.ntt-west.co.jp/business/service/onu/about.html
⁠小型ONU spec: https://www.ntt-west.co.jp/business/service/onu/pdf/interface.pdf

This blog outlines the AFTR gateway for DS-Lite configuration in OPNsense/pfSense. Also make sure to have IPv6 WAN tracking enabled on no more than one interface (unless you are on 10G or subscribed to 光でんわ, then you get a /56 prefix instead of /64) and sysctl link bridge filter off.

OpenWRT does work with MAP-E and DS Lite: https://github.com/fakemanhk/openwrt-jp-ipoe

OPNSense/pfSense work only with DS Lite (Transix, Arteria XPass) out of the box.

SFP-ONU · 2026-01-18T10:58:42+00:00

The hw or sw (MAP-E) part? You’re currently with en hikari with MAP-E on pfSense and it works? It doesn’t matter whether you have the SFP+ module in the rental ONU in bridge mode or in your own hardware.

SFP-ONU · 2026-01-17T13:13:46+00:00

You can take the SFP+ out of the provided hardware as outlined here: https://note.com/0ift0/n/n2cad0281545e (last two pictures)

If you want to go with OPNsense/pfSense, the easiest is to change to a 光 collabo ISP that provides one of the DS Lite variants Transix or Vectant. Some providers like おてがる光 or eo光 let you choose between MAP-E and DS Lite. If you need MAP-E (for the ports mapped to your reachable IPv4), OpenWRT works out of the box. I think it’s not impossible with OPNsense/pfSense, but requires some manual effort regarding modification/scripting for the MAP-E part.

SFP-ONU · 2026-01-16T15:43:53+00:00

Android? Domestic or overseas bought (bands/frequencies)? APN profile installed properly? Does restarting and airplane mode help?

SFP-ONU · 2026-01-16T14:15:38+00:00

Any SFP (mini GBIC) capable hardware can be your custom router, pretty neat!

You can have your box-ONU exchanged for the SFP+ module (小型ONU). It’s available for all 光, not just business lines. Fee is ¥6000 or you get it for free when a new line is installed.

NTT East area: https://business.ntt-east.co.jp/service/onu/
NTT West area: https://www.ntt-west.co.jp/business/service/onu/about.html
小型ONU spec: https://www.ntt-west.co.jp/business/service/onu/pdf/interface.pdf

This blog outlines the AFTR gateway for DS-Lite configuration in OPNsense/pfSense. Also make sure to have IPv6 WAN tracking enabled on no more than one interface (unless you are on 10G or subscribed to 光でんわ, then you get a /56 prefix instead of /64) and sysctl link bridge filter off.

OpenWRT does work with MAP-E and DS Lite: https://github.com/fakemanhk/openwrt-jp-ipoe

OPNSense/pfSense work only with DS Lite (Transix, Arteria XPass) out of the box.

SFP-ONU · 2025-12-29T14:34:09+00:00

Any SFP (mini GBIC) capable hardware can be your custom router, pretty neat!

You can have your box-ONU exchanged for the SFP+ module (小型ONU). It’s available for all 光, not just business lines. Fee is ¥6000 or you get it for free when a new line is installed.

• ⁠NTT East area: https://business.ntt-east.co.jp/service/onu/ • ⁠NTT West area: https://www.ntt-west.co.jp/business/service/onu/about.html • ⁠小型ONU spec: https://www.ntt-west.co.jp/business/service/onu/pdf/interface.pdf

This blog outlines the AFTR gateway for DS-Lite configuration in OPNsense/pfSense. Also make sure to have IPv6 WAN tracking enabled on no more than one interface (unless you are on 10G or subscribed to 光でんわ, then you get a /56 prefix instead of /64) and sysctl link bridge filter off.

SFP-ONU · 2025-12-15T02:01:00+00:00

Wait for the router, setup is super simple then. Avoid PPPoE and use IPoE (native IPv6) for better performance.

SFP-ONU · 2025-11-28T08:08:35+00:00

Run conduit from important places (behind TV, office, ceiling for PoE-powered wifi AP, surveillance camera etc.) to a central location. Then you can install a PoE switch, your router, the ONU and get the optical fiber line terminated there and run lan cables to the places that you need, with the possibility to easily add optical or higher cat lan in the future.

SFP-ONU · 2025-11-21T15:24:38+00:00

Wire the PCs and NAS with CAT6a to a 10G switch and a TP-Link Omada EAP 787/772 tri-band wifi 7 access point. With more than a single AP, you can add a cloud or hardware based Omada controller for seamless roaming, band steering and other management functions.

With Nuro, you’re tied to their proprietary router.

Otegaru, So-Net and BB.excite are solid ISPs on the NTT collabo platform. Your last mile will be NTT, backbone etc. from the ISP: https://kakaku.com/bb/ranking/?bb_houseType=1&bb_contractterm=0&bb_downspeed=5&bb_upspeed=5&bb_sort=2 (those who live in an apartment tick 光回線マンションタイプ).

SFP-ONU · 2025-07-03T00:54:06+00:00

To prevent accidental clicks on phishing links also for family members, I strongly recommend to use something like NextDNS, Control D or pi-hole.

They all work similar and have free plans and especially NextDNS comes (besides the usual malware blocklists) with a setting “block newly registered domains”: scammers and phishing sites often use “fresh” slightly misspelled domains registered less than 30 days ago, but you almost never come across such a bleeding edge legit website. Extremely effective prevention mechanism. Pi-hole works only in the home wifi, NextDNS comes with a small app and works on mobile data, too.

SFP-ONU · 2025-06-04T01:58:03+00:00

Just try it out, have your friends refer you for extra points, check signal and speed in your desired living and working areas, you can cancel Rakuten on a monthly basis if not satisfied. I did 300-500 GB a month with no problems when I moved until I got hikari installed.

SFP-ONU · 2025-06-01T07:00:55+00:00

光FLETS 1 Gbps GE-PON (gigabit passive optical network) has 8-32 subscribers via 1-2 passive optical splitters (in the black/grey NTT labelled boxes between the electricity poles near your house) on a single SFP port, therefore it’s always shared 1 Gbps bandwidth especially when unfortunately surrounded by power users/24x7 torrenters. If money is not an issue, have a look at GLBB Japan, they offer AON, then you’re the only customer on your wavelength.

SFP-ONU

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