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+++ free_internet [2026/05/10 15:10] (current) – particles
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 Consider yourself warned.
+===== FLETS =====
+NTT's FLETS network is the nationwide fiber optic network that offers 1Gbps and 10Gbps symmetric non-guaranteed access. The two main products are 光 Next and 光 Cross (1Gbps and 10Gbps respectively). If you want this network (which is almost always the most easily installed), you need to pay construction costs, contract with NTT, and also contract with an ISP. FLETS leaves the actual ISP up to providing you with Internet services, as by default, FLETS is basically a country wide Intranet rather than direct Internet.
+Lots of ISPs offer collaboration bundles or packages with FLETS. I have experience with AsahiNet, but other people have reported success with Interlink.
+FLETS is IPv6 native, and their Cross course is IPoE only. Extra work is required to use a fixed IPv4 address on the v6 native network. Covering all of the technology is out-of-scope for this, but basically your ISP will offer MAP-E or DS-Lite in some configuration so you can access v4 services. If you intend to operate your own router, do research in-advance on how to do this. Most overseas routers lack support for Japan specific features that are required for v4 to work.