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Network

Rent-included / free apartment internet

Building internet arranged by the landlord or manager and included in the rent or common-area charge rather than contracted separately by each resident.

Ask what reaches the room: fibre, LAN, VDSL, coaxial cable or only shared Wi-Fi. The advertisement may say 'fibre compatible' when fibre reaches only the building, not the room. Also ask the nominal plan speed, whether capacity is shared, whether a router is supplied, and whether each room is isolated from other residents.

Even a 1 Gbps building uplink can feel slow at night when many residents share it. You may have no right to change the provider or troubleshoot directly. Before ordering a private line, get written owner or manager permission and confirm whether new cabling, drilling or equipment in the common area is allowed.

Dictionary

Related guides

3G mobile networksurī-jī
An older mobile generation used for voice and low-speed data. Japanese carriers have retired or scheduled the retirement of their 3G services.
4G / LTEfō-jī / eru-tī-ī
The mature mobile generation that carries most everyday smartphone data and, with VoLTE, voice calls across broad coverage areas.
5G mobile networkfaibu-jī
The mobile generation designed for higher capacity, lower latency and many connected devices, deployed with several frequency bands and network architectures.
5G SA / Standalonefaibu-jī esu-ē
A 5G architecture using a 5G core network rather than relying on a 4G core and 4G control connection as non-standalone 5G does.
ADSLē-dī-esu-eru
An older broadband technology that sends data over a copper telephone line. Major Japanese consumer ADSL services have ended or are being retired.

Sources

Japan Phone Guide

A personal information site about mobile phones in Japan — made and kept up by one person, not a company or a carrier. It does not sell contracts.

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The information here is shared in good faith but may be incomplete, out of date or wrong. Use it at your own risk: no responsibility or compensation is accepted for any loss, cost or disadvantage arising from this content or from anything done based on it. Always confirm with the official source — and, where it matters, a qualified professional — before you decide.

Plan names, prices and conditions were checked against the linked official sources as of 2026-08-29 (JST). Terms can change; confirm the official page before applying.

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