Three Common Misconceptions to Clear Up (Read This First)Experience
It’s a misconception that “if there’s a network outlet in the room, fiber can definitely be connected right away.”
Seeing an outlet on the wall may make you think, “I can just plug in and use it.” What matters is whether there is a 「光コンセント」 (fiber-optic outlet). If fiber has already been brought into the room and a 光コンセント is installed, service may be activated without an on-site visit (「無派遣工事」); otherwise, an installer usually has to visit (「派遣工事」), and you must be there. A regular LAN or telephone jack does not mean a 光回線 has been installed.
NoteBefore signing, confirm whether the property's 「インターネット対応」 means fiber is already wired, it uses VDSL, or new installation work is required.
“工事費実質無料” (installation fee effectively free) often disguises monthly installments.
Ads saying 「工事費0円」 or “effectively free” usually spread the installation fee across monthly bills and offset it in installments—you only receive the full offset if you keep the service for the required period. If you cancel during the minimum contract period, the unpaid installation-fee balance may be charged all at once. SoftBank Hikari's official pricing page says new installation work requiring your attendance can cost anywhere from 0円 to several thousand or tens of thousands of yen. To verify Some prices changed starting in June 2026.
NoteDo not focus only on the 「0円」 label. Check the offset conditions, minimum contract period, and whether a remaining balance will be charged if you cancel early.
Activation doesn’t happen “the same day” like it does with a mobile phone SIM.
It often takes several weeks from applying for fiber to the actual installation. Guide The period around the start of the school year (進学シーズン) is even busier. You may therefore go several weeks between getting your keys and having home internet, disrupting papers, course registration, and communication with your school or landlord.
NoteThe safest approach is to use temporary internet from the airport or your phone (eSIM / テザリング / ポケットWi-Fi) first, then decide whether to arrange a fixed fiber connection.
Choose One of Three Options: Install Fiber, Use an Existing Line, or Use a Mobile HotspotVariable
Swipe sideways to see the full table
| Option | Time to activation | Installation work and attendance required? | Who it suits | Main pitfalls |
|---|---|---|---|---|
| ① Install fiber (new 光回線 installation) | Slow: it often takes several weeks from application to installation Guide, with longer waits during the school-year rush | Without a 光コンセント, a dispatched installer and your attendance are usually required; NTT East says the work itself takes about 1–2 hours Guide | People certain they will stay long term and who need stable, high-capacity service (video, uploading papers, or research from home) | Before signing, ask the landlord or property manager whether drilling is allowed; an “effectively free” installation fee is offset monthly, and cancellation may leave a balance |
| ② Continue using the existing line (無派遣工事; no technician dispatch) | Relatively fast: with a 光コンセント, on-site work may not be needed, so activation is much faster than a new installation | If fiber has already been brought into the room and a 光コンセント is installed, activation may be possible without a dispatched installer or your attendance | Properties where the previous tenant had fiber installed, or that are listed as 「インターネット対応」 | A LAN jack is not the same as a 光回線; first confirm whether it is genuine fiber or VDSL/telephone wiring, and identify the current provider |
| ③ Use a phone hotspot or mobile router temporarily | Fastest: available on the day you arrive (temporary eSIM / SIM) | No installation work or attendance required | Short stays, when you have not decided whether to renew, or as a temporary connection while waiting for fiber | Uses a data allowance and may slow during evening peak hours; suitable only as a temporary option, not for heavy long-term use |
What to Confirm Before Signing Up and When You Move InExperience
Can fiber be installed in this property? Is it a マンションタイプ or 戸建タイプ?
Watch outIt depends entirely on the property. An unwired room needs new installation work and the landlord's permission; in the worst case, 「光NG」 means fiber cannot be installed. Ask before signing.
Is there a “光コンセント” (fiber-optic outlet) on the wall?
Watch outIf there is one, installation without a dispatched installer may be possible (無派遣工事); if not, an installer will probably need to visit and you will have to attend.
Will the landlord or management company allow drilling and installation work?
Watch outThis is one of the easiest points to overlook when signing, only to discover after moving in that internet cannot be installed.
Will you need to be present for a new installation? What date is it scheduled for?
Watch outA dispatched installer generally requires you to be present; NTT East says installation takes about 1–2 hours Guide, so keep half a day free in your schedule.
What are the actual conditions behind “工事費実質無料” (installation fee effectively free)?
Watch outCheck whether the fee is offset in monthly installments, how long the minimum contract period is, and whether the remaining balance is charged all at once if you cancel early.
What temporary Internet option can you use while waiting for service to be activated?
Watch outFiber activation often takes several weeks after arrival or move-in. Use eSIM / phone テザリング / ポケットWi-Fi in the meantime so you are not left without internet.
Additional Points to Consider from an International Student’s PerspectiveExperience
- A common reason fiber feels slow is the connection method. Support for IPv6/IPoE (v6プラス) can noticeably affect speeds during evening peak hours. [要確認 Conditions vary by provider.]
- Check whether the Wi-Fi router (ONU/HGW) is rented for a monthly fee or provided by you; many people do not realize they are still paying rental fees.
- Benefits such as 「乗り換えキャッシュバック」, gift cards, or a router often have complicated redemption terms: an application deadline, paid options you must add, or a required number of months you must remain subscribed. You may not receive them if you cannot read Japanese. They are not guaranteed, so do not choose the wrong plan just for a promotion.
- When returning home or moving out, you may owe a second final charge in addition to the cancellation fee: 「撤去費」 (the cost of removing the line). This is rarely mentioned when you move in.
- Short-term students should take particular care: fiber plans often renew automatically every 2–3 years and charge a cancellation fee outside the renewal month. Decide how long you will stay before committing to a long contract.
Official procedure links
- NTT East Japan フレッツ光 Installation Guide (technician dispatch, attendance, and estimated time)Installation takes around 1–2 hours Guide; you must be present if a technician is dispatched
- NTT East Japan フレッツ光 Application GuideOverview of the application process
- SoftBank 光 Pricing and Installation Fee PageNew installation fees range from 0円 to tens of thousands of yen To verify; some prices changed starting June 2026
Japanese Term Guide: Words You’ll Hear When Signing Up and Arranging Installation
- 光コンセント
Fiber-optic outlet: A dedicated outlet in the room where a fiber-optic cable enters the premises. If you see one on the wall, you may be able to get connected without an in-home installation visit. A regular Ethernet or telephone jack does not count.
- 光回線ひかりかいせん
Fiber-optic line: Fixed broadband that uses fiber-optic cable, as opposed to a telephone line (VDSL) or mobile network.
- 派遣工事はけんこうじ
In-home installation: Installation work where a technician visits your home and runs a cable into the room. This is usually required if there is no 光コンセント in the room, and you must be present.
- 無派遣工事むはけんこうじ
Installation without a home visit: If a fiber-optic line has already been brought into the room and there is a 光コンセント, a technician may not need to visit and you may not need to be present, allowing service to start sooner.
- 立会たちあい
You must be present: You need to be there to assist on the day of an installation visit. It usually takes around 1〜2 hours [目安].
- 工事費こうじひ
Installation fee: The cost of installing the line. Advertised offers of “effectively free” installation often mean the fee is divided into installments and offset against your monthly bills; canceling mid-term may leave an unpaid balance.
- 最低利用期間さいていりようきかん
Minimum contract period: The period you agree to keep the service. Canceling during this period often means paying a cancellation fee, and any remaining installation fees that have not been offset may be charged in a lump sum.
- 撤去費てっきょひ
Removal fee: The cost of removing the line when you move out or return home—the second final bill that no one usually mentions when you move in.
Practice Scenario: Calling a Provider to Sign Up (polite phone Japanese, with pronunciation guides to follow along)Experience
お世話になります。光回線を申し込みたいのですが。
Hello. I’d like to sign up for fiber-optic broadband.
かしこまりました。まずご住所を教えていただけますか？
Certainly. Could you first tell me your address?
この物件は光回線に対応していますか？部屋に光コンセントはありますか？
Is fiber-optic service available in this building? Is there a fiber-optic outlet in the room?
お調べします。光コンセントがあれば、無派遣工事で開通できる場合がございます。
Let me check. If there is a fiber-optic outlet, it may be possible to activate service without an in-home installation visit.
派遣工事になる場合、立会いは必要ですか？
If an installation visit is needed, do I have to be there?
はい、派遣工事では立会いが必要です。工事はおよそ1〜2時間かかります。
Yes, you need to be present for an in-home installation. It takes about 1-2 hours.
工事費と最低利用期間を教えていただけますか？
Could you tell me the installation fee and minimum contract period?
工事費は分割でのお支払いになります。期間内に解約されますと、残りの工事費を一括でご請求いたします。
The installation fee is paid in installments. If you cancel during the contract period, the remaining installation fee will be charged in a lump sum.
開通まではどのくらいかかりますか？
About how long will it take to get connected?
工事の混雑状況にもよりますが、数週間いただくことがございます。
It depends on how busy the installation schedule is; it can sometimes take a few weeks.