Japanese Phone Numbers and Automated Menus: Prefixes, Call Charges & Keypad Guide

A Japanese phone number often tells you what kind of line or service you are calling. Geographic fixed-line numbers use area codes, while mobile, IP-phone and service numbers use non-geographic prefixes.

This matters because reachability and charging can differ. A normal-looking customer-service menu reached through 0120 can be toll-free to the caller, while a similar menu reached through 0570 can be caller-paid.

• 03, 06 and other area codes: geographic fixed-line numbers
• 070, 080, 090: mobile numbers
• 050: IP-phone numbers
• 0120 and 0800: toll-free service numbers
• 0570: caller-paid unified service numbers
• 110, 118 and 119: emergency numbers

Tokyo commonly uses 03 and Osaka commonly uses 06, while other areas use different geographic codes. The grouping of digits can vary, so do not assume every landline follows the same hyphen pattern.

Businesses often publish a representative number rather than a direct employee line. If you are calling an office, prepare the organization name, department, person's name and purpose before dialing.

• Representative number: often reaches reception, a switchboard or an automated menu
• Direct number: may reach a department or person more directly
• Extension number: usually entered only after the main line connects

Ordinary Japanese mobile voice numbers commonly begin with 070, 080 or 090. A 050 number identifies an IP-phone service rather than a geographic area.

The prefix alone does not prove who is calling. Caller ID can help you recognize a saved contact, but an unfamiliar number should still be verified through the organization's official website or documents when the call involves money, identity information or account access.

• 070 / 080 / 090: ordinary mobile-number ranges
• 050: IP-phone range
• Do not treat a familiar-looking prefix as proof of identity
• Use an official published number when calling back about a sensitive request

Toll-free services such as NTT Free Dial use 0120 and 0800 number ranges, although connection availability can depend on the originating line or service.

NTT's Navi Dial uses 0570 numbers and the caller pays the applicable charge. NTT also states that calls from mobile phones to Navi Dial are outside mobile carriers' flat-rate calling plans. Because rates and service conditions can change, listen to the pre-call rate announcement and check the current service page when cost matters.

• 0120 / 0800: generally toll-free to the caller when the originating line is supported
• 0570: caller-paid service
• 0570 is generally outside mobile flat-rate calling plans
• Listen for the rate announcement before continuing a long call

Japan's country code is +81. When converting an ordinary Japanese domestic number to international format, the leading domestic 0 is normally removed. For example, a domestic mobile number written 090-1234-5678 becomes +81-90-1234-5678.

The same principle commonly applies to geographic numbers such as 03. Service numbers such as 0120 or 0570 may not be reachable from overseas, so use the organization's separately published international or geographic contact number when one is provided.

• Inside Japan: keep the domestic leading 0
• International format: use +81 and normally remove the first 0
• Check whether toll-free or special-service numbers accept overseas calls

Japanese automated menus often ask you to choose a service by pressing a number. The order and meaning of the keys vary by organization, and menus can change after system updates.

Listen to the entire prompt before pressing anything. If you miss a choice, many systems repeat the menu after a pause, but some return to the beginning or disconnect.

• Open the keypad after the call connects
• Listen for the topic you need
• Press only the number stated in the current prompt
• Do not assume 0, *, or # has the same function on every system
• Wait for the repeat option if you did not understand the first pass

You do not need to understand every word. Recognizing a few high-frequency phrases can be enough to follow the routing.

Numbers may be read one digit at a time. An automated recording can also ask for a customer number, reservation number, date of birth or extension before transferring the call.

• go-yōken no bangō o oshite kudasai — press the number for your request
• naisen bangō — extension number
• tantōsha — person in charge
• operator — operator
• mō ichido — once again
• shōshō omachi kudasai — please wait a moment
• uketsuke jikan — service hours

A menu choice selects a service path. An extension routes the call to a specific department, desk or person after the main system answers. Do not enter an extension until the recording or receptionist asks for it.

If written instructions say to press # after the extension, follow them. Otherwise, wait for the system to detect the completed number or for the next prompt.

• Menu choice: selects the type of service
• Extension: routes to a specific internal destination
• Customer or reservation number: identifies your case, not your destination

Automated menus become much easier when the information you may need is already in front of you. Write down only what is relevant to the call and keep enough time available to listen carefully.

For customer-service calls, prepare the official phone number, account or reservation reference, dates, names and a short explanation of the problem. If a menu is long, note the sequence of keys only after you have confirmed what each choice means.

• Official contact number
• Customer, reservation or case reference if required
• Appointment or service date
• Your name and registered contact details
• Short description of the request
• Pen and paper for the operator's name or reference number

An unexpected caller may imitate a bank, government office, delivery company or telecom provider. Do not let caller ID or a convincing automated voice pressure you into entering sensitive credentials.

Never provide a bank PIN, password or one-time authentication code because an unsolicited call tells you to. End the call and contact the organization through a number you independently verified. For urgent danger or an active incident, use the appropriate emergency number instead of following an unknown caller's instructions.

• 110: police emergency
• 119: fire and ambulance emergency
• 118: maritime incidents and emergencies
• #9110: police consultation for non-emergency concerns
• Verify sensitive requests using an independently confirmed number