The Basics of Navi Dial
NTT Communications' Navi Dial (0570) is a nationwide unified-number service widely used by call centers and inquiry desks to route calls from across Japan to specific locations. According to MIC's number-assignment statistics, around 300,000 0570 numbers are in use - the service is well-established as a corporate inquiry channel. Understanding its pricing matters for avoiding wasteful charges. Smartphone savings guides can help you reassess your overall plan.
Navi Dial offers companies the convenience of "one number reachable nationwide" but charges the caller, often at premium rates. Unlike toll-free numbers, this is the opposite design - and customers frequently complain that "Navi Dial is expensive."
Pricing for Landline Originations
Calls to 0570 from landlines (subscriber lines, Hikari Denwa, etc.) cost about 11 yen for 3 minutes (tax included) - slightly above local rates (9.35 yen per 3 minutes). It can even be cheaper than long-distance, so for landline users it's not a major issue.
However, charges vary by the "zone" set by the receiving company - some use 20-seconds-for-10-yen or 30-seconds-for-10-yen plans, leading to several hundred yen for long inquiries.
Pricing for Mobile Originations
From mobile phones, 0570 is significantly more expensive - typically 11 yen per 20 seconds, or about 99 yen per 3 minutes. That's about 9x the landline rate. A 30-minute consultation costs around 990 yen.
More importantly, mobile carrier unlimited plans do not cover Navi Dial. Even with "24-hour unlimited" or "5-minute unlimited" plans, 0570 originations are billed separately. As covered in toll-free vs Navi Dial differences, this is the most common consumer complaint.
Why Navi Dial Costs More
A pricing model favoring receivers
Navi Dial is designed so "companies can pass call-center operating costs to callers." Some service tiers even share part of the call revenue back to the receiving company (revenue-sharing model), which lowers their operational burden.
Why unlimited plans don't apply
Navi Dial uses NTT Communications' own billing system, which isn't integrated with mobile carriers' flat-rate calling plans. Technical and contractual constraints have prevented inclusion, leaving consumers paying premium rates.
What Consumers Can Do
Find alternative numbers
Many companies list non-Navi-Dial numbers on their websites or FAQs. Searching "company name + 03" or "company name + direct line" often surfaces an area-coded alternative. Some companies publish 03/06 numbers for overseas customers or direct lines for IR departments.
Use email and chat
Many companies now accept inquiries by email, chat, or web form. For complex or lengthy matters, written exchanges are often cheaper. Reserve 0570 for issues that truly require voice contact.
Originate from a landline or Hikari Denwa
Landline originations are dramatically cheaper than mobile. If your household has a Hikari Denwa line, build a habit of dialing 0570 numbers from the landline to minimize monthly charges.
Submit feedback to the Consumer Affairs Agency
The Consumer Affairs Agency has officially flagged Navi Dial pricing concerns. For unreasonable bills, consider consulting the Consumer Hotline 188.
Spotting 0570 Numbers and Verifying Charges
To confirm before connecting, build these habits.
- Always check for an alternative on the company website before dialing 0570
- An automated "20 seconds for 11 yen" announcement within 20 seconds confirms standard Navi Dial billing
- If the announcement says "guidance selection time is also billed," beware long holds
- Remember mobile unlimited plans don't apply, and keep calls minimal
- For expected long calls, originate from a landline or pay phone
Trends Toward Discontinuation
Amid rising complaints, more companies are discontinuing Navi Dial in favor of landline numbers or 0120. The Japan Pension Service ended Navi Dial in 2018, switching to toll-free and landline numbers. NHK and Tokyo Metropolitan Government have followed similar paths. The trend is expected to continue, increasingly favoring consumers.
For companies, Navi Dial complaints can spread on SNS and damage brand image. As covered in how to choose a business phone number, customer-facing number selection mirrors a company's stance on customer service.