Quick Answer
To call Japan from Brazil, dial 00 + carrier code + 81 + area/mobile prefix (drop leading 0) + local number. From a mobile, you can simply dial +81 followed by the number. With Sayfone, just enter the Japanese number in your browser — calls start at $0.36/min.
$0.36
Per minute
+81
Country code
HD
Call quality
Landline rate
$0.36/min
Mobile rate
$0.36/min
Same per-minute Sayfone rate for landline and mobile.
Average call quality
Brazil's unique carrier-selection system can make international dialing confusing. Sayfone bypasses that complexity entirely, connecting your call over the web with transparent per-minute pricing.
Steps at a glance
Sources
Carrier selection code and exit code details for Brazil
Japan country code and area code reference
DIALING GUIDE
Follow these steps to correctly dial a Japanese phone number from Brazil. Brazil's carrier-selection system adds an extra code to international calls, but the process is straightforward once you know the pattern.
From a Brazilian landline, dial 00 followed by your two-digit carrier selection code (e.g., 21 for Claro/Embratel, 41 for TIM, 15 for Vivo). From a Brazilian mobile phone, you can simply press and hold 0 to get the + symbol, which replaces the exit code and carrier code entirely.
00 21 (using Claro) or + (from a mobile)
Dial 81, which is the international country code for Japan. This routes your call from the Brazilian network to the Japanese telephone system.
00 21 81 or +81
Japanese domestic numbers start with 0, but you must omit it when calling from abroad. For landlines, enter the area code without the 0 (e.g., Tokyo 03 becomes 3, Osaka 06 becomes 6, Nagoya 052 becomes 52). For mobiles, the prefixes 090, 080, and 070 become 90, 80, and 70 respectively.
00 21 81 3 (Tokyo landline) or +81 90 (mobile)
Enter the remaining digits of the phone number. Japanese landline numbers typically total 9–10 digits including the area code (with the leading 0). Mobile numbers have 10 digits domestically (e.g., 090-XXXX-XXXX).
00 21 81 3 1234 5678 (Tokyo landline) or +81 90 1234 5678 (mobile)
Open Sayfone in your browser from Brazil, enter the Japanese number in international format (+81…), and press call. Sayfone handles the routing automatically at $0.36/min. No carrier selection codes, no memorizing exit prefixes.
Enter +81 3 1234 5678 in Sayfone
Dialing format reference
+81
Use these patterns when entering a full international number to +81.
Mobile
+81 [70/80/90] XXXX XXXX
Landline
+81 [area code] XXXX XXXX
Major city area codes
Sources
Brazil carrier selection and international dialing format
Japan phone number formats and country code
Japan area codes and mobile prefixes
IMPORTANT RULES
International calls from Brazil involve a unique carrier-selection system, and Japan's numbering plan has its own quirks. Keep these rules in mind to avoid failed connections.
Brazil's ANATEL requires a two-digit carrier selection code for all international (DDI) calls placed from landlines. The format is 00 + carrier code + country code + number. Common codes include 21 (Claro/Embratel), 41 (TIM), and 15 (Vivo). If you omit the carrier code, the call will not connect.
From a Brazilian mobile phone, you can bypass the 00 + carrier code sequence by using the + symbol (usually by holding the 0 key). This tells your phone to handle the international routing automatically. The format becomes +81 + number.
Japanese area codes and mobile prefixes start with 0 when dialed domestically (e.g., 03 for Tokyo, 090 for mobile). When calling from Brazil, always remove that leading 0. Dial 3 for Tokyo, 90 for a mobile, etc.
A Japanese mobile number is 11 digits in international format: +81 followed by 10 digits (e.g., +81 90 1234 5678). The first digit after +81 will be 7, 8, or 9 (from the domestic 070, 080, or 090 prefixes). If your contact gives you a number with fewer digits, verify it before calling.
Some carrier codes are only available in certain Brazilian states. For example, Vivo (code 15) may not be available outside São Paulo state for international calls. If your call fails, try a different carrier code or use the + dialing method from a mobile.
If you are visiting Brazil on international roaming, you do not need to use the Brazilian carrier selection system. Simply dial +81 followed by the Japanese number as you normally would from any country.
TIMING TIPS
Brazil and Japan are roughly 12 hours apart, which means coordinating calls requires planning. Here are practical timing strategies for the Brazil–Japan corridor.
Most of Brazil operates on Brasília Time (UTC−3), while Japan Standard Time is UTC+9. That 12-hour gap means when it's morning in São Paulo, it's evening in Tokyo — and vice versa.
Best for calling family in Japan
7:00–9:00 AM BRT → 7:00–9:00 PM JST
Catch family members in Japan after dinner and before bedtime
Best for calling family in Brazil
7:00–9:00 AM JST → 7:00–9:00 PM BRT (previous day)
If you're in Japan, call Brazil in your morning to reach them in the evening
Weekend overlap window
8:00–10:00 AM BRT → 8:00–10:00 PM JST
Saturday mornings in Brazil align with Saturday evenings in Japan
Sources
Brazil time zone overview
TROUBLESHOOTING
If your call to Japan isn't connecting, here are the most common causes and how to fix them.
This usually means the carrier selection code is missing or incorrect. From a Brazilian landline, you must dial 00 + a valid two-digit carrier code (e.g., 21, 41) before the country code 81. From a mobile, use the + symbol instead.
Your chosen carrier may not support international calls to Japan, or it may not be available in your region. Try a different carrier code (e.g., switch from 15 to 21) or use the + dialing method from your mobile.
Check the time difference — Japan is 12 hours ahead of Brasília Time. You may be calling in the middle of the night in Japan. Use the timing tips above to find a suitable window.
Make sure you dropped the leading 0 from the Japanese number. A Tokyo number like 03-1234-5678 should be dialed as +81 3 1234 5678. A mobile like 090-1234-5678 becomes +81 90 1234 5678.
Traditional carrier-routed international calls can suffer from latency over the Brazil–Japan distance. Sayfone uses optimized web-based routing — open it in your browser for clearer calls at $0.36/min.
Sources
Common international dialing errors
Savings
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220
min / month
~$17.64/min
~$13.32/min
~$7.92/min
~$1.80/min
$0.360/min
Annual saving vs. AT&T
Based on 220 min/month
Before you go
Open the full Brazil to Japan guide, check rates, or browse other how-to guides from Brazil.
Brazil to Japan calling guide
Per-minute rates, savings calculator, and what to expect on this route.
What it costs to call Japan
See Sayfone’s per-minute rate for Japan and how it compares before you dial.
Route guides from Brazil
FAQ
Answers to the most common questions about dialing Japan from Brazil, including codes, costs, and timing.
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