NTT East
NTT to launch 25 Gps FTTH service in Tokyo starting March 2026
NTT East plans to launch a 25 Gbps Fiber-to-the-Home (FTTH) service in Tokyo starting March 2026, according to Telecompaper, The service will offer significantly faster residential broadband, building on their existing fiber services and recent developments in higher-speed business options. Currently, the highest speed Fiber-to-the-Home (FTTH) access plan commercially available in Japan is 10 Gbps offered by multiple fiber optic network providers, including NTT East/West and Sony-backed NURO Hikari.
NTT’s forthcoming Flet Hikari 25G service will be a best-effort FTTH access product, utilizing shared subscriber fiber to connect customers to their chosen Internet Service Providers (ISPs).
The launch is part of NTT’s broader initiative to develop next-generation digital infrastructure, which also includes the development of key devices for an ultrafast optical network under its “Innovative Optical and Wireless Network” (IOWN) project in 2026.

Source: NTT Access Service Systems Laboratories
Separately, researchers in Japan have set world records for internet transmission speeds using experimental fiber optic technology, reaching speeds of over 1 petabit per second (which is over a million gigabits per second) in laboratory settings. These are research achievements and not a commercially available service for everyday use.
References:
https://www.ntt-review.jp/archive/ntttechnical.php?contents=ntr201604fa6.html
https://www.telecompaper.com/news/ntt-east-and-west-launch-10-gbps-service–1538339
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