What's the country code for Japan?

+81 is Japan's international country code. When calling from South Korea, always start with +81 followed by the area code (without the leading 0) and the local number.

Do I need a special access code from South Korea to call Japan?

With Sayfone, you don't need an access code; call directly from your browser. If using a traditional phone line, South Korea's international access codes are 001 or 002, but Sayfone simplifies this by dialing directly.

Why do I drop the leading 0 from Japanese area codes?

The leading 0 is used only for domestic calls within Japan. International calls use the ITU E.164 standard, which requires the 0 to be removed. For example, Tokyo's domestic code 03 becomes 3 when dialed internationally.

Is the rate the same for landlines and mobile numbers?

With Sayfone, all calls to Japan are charged at the same transparent per-minute rate ($0.36/min) regardless of whether you're calling a landline or mobile number. The rate is displayed before you dial.

Can I call Japanese toll-free numbers (0120) from South Korea?

Most toll-free numbers (0120, 0570) cannot be reached from outside Japan. Ask the business for their standard business line instead. Regular landlines and mobile numbers always work internationally.

What's the time zone difference between South Korea and Japan?

South Korea (KST, UTC+9) and Japan (JST, UTC+9) are in the same time zone year-round. Neither country observes daylight saving time, so there is no time difference to account for.

How do I know if my call connected?

With Sayfone, you'll hear a dial tone and the phone will ring when connected. If the number is invalid or unreachable, you'll hear a fast busy signal or an error message immediately. The rate only applies once the recipient answers.

Are there any hidden fees with Sayfone?

No. Sayfone charges transparent per-minute rates with transparent pricing, connection charges, or signup costs. The rate is shown before you call, and you're only charged from the moment the call is answered.

Quick Answer

How to Call Japan from South Korea

Call Japan from South Korea by dialing +81 followed by the area code and local number. Sayfone offers transparent international rates starting at $0.36/min.

Start calling

Cost tools

🇰🇷From South Korea

To Japan🇯🇵

$0.36

Per minute

+81

Country code

Call quality

Landline rate

$0.36/min

Mobile rate

$0.36/min

Same per-minute Sayfone rate for landline and mobile.

Average call quality

Steps at a glance

Dial +81 (Japan country code)
Enter the area code (without leading 0)
Dial the local phone number
Review rate and place call

Sources

1
ITU Recommendation E.164 - International public telecommunication numbering plan
Used for country code verification

STEP-BY-STEP

Dialing Steps to Japan

Follow these steps to place a call from South Korea to Japan using Sayfone.

1
Start with the international access code
From South Korea, dial 001 or 002 to reach international lines, or use Sayfone directly via browser without a special access code.
```
001 or 002 (for traditional calls); no code needed for Sayfone
```
2
Enter Japan's country code
Dial +81 (the international country code for Japan).
```
+81
```
3
Dial the area code (without the leading 0)
Japanese area codes are written domestically with a leading 0, but when calling internationally, drop the 0 and enter the remaining digits.
```
Tokyo: 3 (domestic 03), Osaka: 6 (domestic 06), Kyoto: 75 (domestic 075)
```
4
Enter the local number
Complete the call with the local subscriber number.
```
Tokyo number: +81-3-1234-5678
```
5
Place the call
With Sayfone, review the displayed rate and press the call button to connect.
```
Rate shown before dialing; press 'Call' to connect
```

Dialing format reference

+81

Use these patterns when entering a full international number to +81.

Mobile

+81-90-XXXX-XXXX or +81-80-XXXX-XXXX

Landline

+81-[area code]-XXXX-XXXX

+81-3-1234-5678 (Tokyo)
+81-6-1234-5678 (Osaka)
+81-75-123-4567 (Kyoto)
+81-90-1234-5678 (Mobile)

Major city area codes

Tokyo3

Osaka6

Kyoto75

Yokohama45

Sapporo11

Sources

1
ITU Country Code Assignment - Japan (+81)
Country code reference

DIALING RULES

Japan Dialing Format Rules

Japan's numbering system requires specific formatting for international calls. Follow these rules to ensure successful connections.

Drop the leading 0 from area codes

When calling Japan internationally, remove the leading 0 from the area code. For example, Tokyo's domestic code 03 becomes just 3 when called from abroad.

Mobile and landline use the same dialing format

Both mobile phones (starting with 09) and landlines (starting with area code) follow the same international format: +81 followed by the number without the leading 0.

Include the full 10-digit number after country code

Japanese phone numbers require all digits after +81. Do not omit any digits or abbreviate the local number.

No dashes required for Sayfone dialing

Enter numbers as a continuous sequence of digits. Sayfone will format the display; you may use dashes for readability when writing numbers down, but enter digits only when dialing.

CALLING TIPS

Best Times to Call Japan from South Korea

Timing your call can improve connection rates and respect both parties' schedules. Here are practical tips for calling Japan from South Korea.

🇯🇵

South Korea (KST, UTC+9) and Japan (JST, UTC+9) are in the same time zone year-round, so time difference is not a factor. Focus on local working hours and cultural etiquette.

Time & windows

Business Hours

9 AM – 6 PM JST/KST

Best for business and professional calls

Evening/Weekend

7 PM – 11 PM JST/KST

Good for personal contacts; avoid very late hours

Early Morning

Before 8 AM JST/KST

Generally not recommended for personal calls

🇰🇷Weekday business calls

9 AM – 5 PM Japan Standard Time (JST)Matches South Korean business hours; most offices and professionals are available

🇰🇷Personal calls

7 PM – 10 PM JSTAfter work hours; generally respectful for evening contact

🇰🇷Weekend calls

Daytime (9 AM – 8 PM JST) on Saturday and SundayAcceptable for non-urgent personal contact

Calling tips

Both countries share the same time zone (UTC+9) year-round, so no adjustment needed.
Confirm the recipient's availability before calling; early morning calls are considered impolite.
Weekday mornings (9 AM – 12 PM) are ideal for business contacts in Japan.
Allow for a 2–3 second delay on international calls; this is normal and not a connection issue.

Business etiquette

For business calls, introduce yourself clearly and state the purpose immediately.
Avoid calling during lunch hours (typically 12–1 PM) or just before closing (after 5 PM).
Japanese business culture values punctuality; if scheduling a call, be on time.
For personal calls, a brief greeting in Japanese (even 'konnichiwa') is appreciated and shows respect.

Sources

1
World Time Server - South Korea and Japan Time Zones

TROUBLESHOOTING

Common Issues and Solutions

If your call to Japan doesn't connect or has quality issues, here are the most common causes and how to resolve them.

Call won't connect – 'Number not recognized'

Verify you've removed the leading 0 from the area code. Japanese domestic numbers start with 0, but international calls require the 0 to be dropped. Example: Dial +81-3-xxxx-xxxx, not +81-03-xxxx-xxxx. Also confirm the full number has no extra spaces or special characters.

Poor audio or frequent disconnections

International call quality depends on both your internet connection and the recipient's line. If using Sayfone from South Korea, check your Wi-Fi signal strength. Wired internet or 5G mobile data typically provides more stable connections than older mobile networks. Try switching networks if available.

Charge applied but call didn't complete

Sayfone's transparent per-minute pricing is calculated from when the call is answered, not from when you press dial. If the recipient didn't answer, no charge applies. Verify the call actually rang through; busy signals or network rejections do not incur charges.

Calling a business or toll number

Most standard landlines and mobile numbers in Japan can be dialed internationally. Some business toll numbers (0120, 0570) may not be reachable from abroad. If a toll-free number doesn't work, contact the business directly for their standard business line.

Savings

See what you could save

Adjust the tools below to compare Sayfone with typical retail pricing for calls to Japan. Start with one call, then layer on monthly volume to see the bigger picture.

How to use these tools

Sayfone uses your live rate for calls to Japan — the same basis as the rest of this page.
First, estimate savings on a single call length. Then, model a full month of minutes versus typical retail benchmarks.
Retail competitor rows are illustrative — not a quote from any carrier.