Why "1-yen iPhones" can appear to be sold for 1 yen

First, there are broadly two types of "1-yen smartphones": ① 1-yen lump-sum payment at stores or mass retailers, and ② effectively 1 yen (or 1 yen/month, etc.), which adjusts the monthly burden with the premise of returning the device. The former achieves "1 yen" by compressing the device price to the limit through a combination of discounts associated with line contracts and unique store discounts.

The latter uses carrier device purchase (residual value) programs to exempt the remaining balance by returning the device after a certain period, making the perceived burden extremely light.

In addition, recent regulatory changes, including revisions to discount regulation guidelines, have continually clarified the upper limits for line contract discounts and device discounts.

Within these frameworks, the standard pattern in recent years is to reach "1 yen on paper" by combining discounts conditional on MNP (switching carriers) or specific plan subscriptions, and exemption from the remaining balance upon return.

Even in 2025, cases of "effectively 1-yen" sales continue to be observed.

The key point is that "1 yen is often more about 'presentation' than the 'minimum total payment'." Always check for associated costs such as return fees, handling fees, total plan costs, administrative fees, and optional service fees.

Differences between "1-yen lump-sum payment" and "effectively 1 yen / 1 yen per month" and how to choose

What is "1-yen lump-sum payment"? (Assumption of no additional costs after contract)

A 1-yen lump-sum payment is typically where the device payment is completed at the time of sale, and there are no further installment payments or return obligations.

However, in practice, it often materializes only upon fulfilling complex conditions such as a simultaneous MNP contract, subscription to a specified plan, or unique store discounts, and the funding depends on revenue and incentives tied to the line contract.

When choosing, always carefully read the "terms and conditions", including cancellation fees, plan change eligibility, and handling of early cancellations.

Characteristics and risks of the "effectively 1 yen / 1 yen per month" model (return, remaining balance, repair costs)

"Effectively 1 yen" is a design (residual value program) where long-term installments (e.g., 48 times) plus device return after a certain period leads to exemption from the remaining payments.

This is based on the idea of a "right to use," with the premise of returning the device. If the return is delayed, the device is not returned, or it is damaged, the exemption may not apply, or additional fees may be incurred.

Return conditions and assessment standards vary by carrier, so check the special provisions and disclaimers.

Examples of "1-yen lump-sum payment" that were actually conditional (combined discounts, binding conditions)

Even if it says "1-yen lump-sum payment" on paper or POPs, it can actually be conditional on multiple factors such as "required line contract + optional subscription + no early cancellation." The larger the unique store discount, the stricter the applicable conditions tend to be. Compare the total cost to see if the conditions are acceptable.

Latest cases from major carriers (as of 2025) and future outlook

Basics of SoftBank's "Shin Toku Suru Support"

SoftBank's "Shin Toku Suru Support" is a system where, if the device is returned and assessed at the specified timing, the remaining installment payments are waived. If the device does not meet the assessment standards, an additional payment of 22,000 yen is required in addition to device collection, and return conditions and fees are clearly defined (check the official page for the latest conditions).

Trends in sales (continuation of "effectively ◯ yen")

As of October 2025, multiple summary articles indicate that "effectively 1 yen to several tens of yen" campaigns are still seen, conditional on "switching from another carrier + 2-year return", etc. However, "costs other than 1 yen", such as privilege usage fees or administrative fees upon device return, may be required, so confirm the final total payment.

Revisions to discount regulations and future outlook

In late 2024, the Ministry of Internal Affairs and Communications guidelines were revised, and discount limits were adjusted. As a result, while "extreme dumping" is curbed, the reduction of actual burden through residual value schemes based on returns and plan bundling continues. Since regulations are fluid, it is important to update the latest official information in articles as needed.

iPhone "1-yen" Pitfall Checklist to Avoid Failure

Return requirement / Risk of remaining balance

If the return deadline is missed or you choose not to return the device, payments for the remaining installments will continue. If you have no intention of returning the device, "effectively 1 yen" may not be the cheapest option.

Additional charges for damage or malfunction

If the device does not meet the assessment criteria upon return, additional fees may be incurred. Protect your device daily with a case and film, and especially avoid water damage and screen cracks.

Contract cancellation fees, binding period, and cancellation timing

Beware of conditional risks such as severe penalties for early cancellation or losing discounts if you change your plan. It is wise to understand the optimal month for cancellation or model change and act on a schedule that maximizes benefits.

Resale restrictions / Risk of blacklisting

Actions deemed as abuse of campaigns (e.g., early line cancellation, bulk purchases) can lead to risks such as sales refusal from stores or carriers. Adhering to the rules is essential.

Total comparison with communication plan costs

"Cheap device = cheap overall" is not always true. Simulate the total payment over two years (device + line + options + fees) and always compare it with other options such as refurbished devices + low-cost plans.

Alternatives to getting an iPhone for "1 yen" smartly

Utilizing used/refurbished iPhones (quality, warranty, stock assessment)

Choosing a refurbished used device has the advantage of allowing you to actually purchase it while avoiding return obligations and high-priced plan bundling. Choose a shop with clear status and warranty, and check battery condition / network usage restrictions / initial defect support.
PRODIG sells devices after clearly stating the condition rank and performing initial operation checks and cleaning. The lineup can be found in the collection below.
→ PRODIG's used iPhone list here

Condition rank (guideline)

• S rank: New, unopened item.
  
  

• A rank: Very good. Slight scratches/signs of use. Overall clean.
  
  

• B rank: Good. Scratches/small dents from daily use. No functional issues.
  
  

• C rank: Fair. Noticeable scratches and paint peeling. No impact on function.
  
  

Installment purchase + point rewards/cashback type

Combining electronics retailer points and card cashback can reduce the actual burden. For those for whom the residual value type with long-term return is not suitable, actual purchase + rewards is a simpler and more reproducible option.

Utilizing older models/lower-priced models

It is customary for prices of previous generations to drop in the shadow of the latest generation. By determining the minimum required SoC performance, storage, and camera for your needs in photos, videos, and games, you can maximize cost-effectiveness.

Device rental/subscription

For short-term use or verification purposes, rental is an option. PRODIG's rental counter is here.
→ https://prodig-rental.com/

Reasons to choose PRODIG and navigation (3 axes: safety, value, practicality)

Inspection, maintenance, and warranty process

The biggest concern with purchasing used items is "variability in condition." PRODIG inspects key functions such as exterior, display, input, wireless, camera, and battery, and clearly states initial defect handling and return eligibility conditions. Our system of online + Akihabara store alleviates pre- and post-purchase concerns. (Information about the Akihabara store is also available on our official X account).
→ https://x.com/prodig_inc

Coordination of buyback/trade-in (optimizing replacement costs)

When replacing a device, buyback can reduce the actual burden. We offer easy mail-in buyback and in-store buyback.
→ https://prodig-kaitori.com/

How to find product examples (search by series)

Avoid listing individual product URLs; it is efficient to cross-search inventory, price ranges, and conditions from the series collection.

• PRODIG's used iPhone list here
  
  

• If you want to use an iPad series:
  
  

• PRODIG's used iPad series list here
  
  

• PRODIG's used iPad Air series list here
  
  

• PRODIG's used iPad Pro series list here
  
  

How to use (basics of online purchase)

Search inventory → Check condition, accessories, and warranty → Add to cart → Payment → Shipping notification → Initial operation check after receipt. Perform basic function tests immediately upon arrival (calls, Wi-Fi, camera, Face/Touch ID), and in case of any issues, contact us within the specified period for smooth resolution.

Frequently Asked Questions (Q&A for beginners)

• Q: What is the battery condition?
  A: Check the "Condition/Supplement" field on the product page. As consumables, also estimate replacement costs if necessary.
  
  

• Q: Can I use an eSIM?
  A: Depends on the model and carrier specifications. Confirm compatibility with your desired line in advance.
  
  

• Q: What about the warranty?
  A: Initial defect handling and duration are subject to seller's regulations. Always confirm conditions and duration before purchase.
  
  

Quick Reference for "Optimal Solutions" by Case (Total Cost Focus)

• Want to upgrade to the latest model every 2 years
  → Effectively a "return-based" model. However, managing the risk of delayed return or damage costs is a condition.
  
  

• Want to "own" the device / Want plan flexibility
  → Actual purchase of a refurbished device + low-cost plan. Cheaper overall.

PRODIG's used iPhone list here

• Want to use for only 1 year / Event operation
  → Rental to fix costs.

 https://prodig-rental.com/

• Corporate use / Multiple unit introduction
  → Corporate inquiry desk to arrange inventory and invoice payments.https://prodig-shop.com/pages/b2b-reception
  
  

Summary - The Truth About "1-Yen iPhones" and Your Cheapest Solution

"1-yen iPhones" are often made possible by discounts and return schemes that are a "way of presenting" them, and understanding the total cost including return conditions, assessment, fees, and plan costs is essential. Even in 2025, "effectively 1-yen" deals are seen, but complexity of conditions and additional costs due to returns can be risks.

On the other hand, actual purchase of a used/refurbished device is an option that avoids return obligations and high-priced plans, securing ownership and flexibility. Choosing a shop with high transparency in information regarding condition, warranty, and price can optimally balance the three axes of safety, value, and practicality. If you are considering a purchase, start by understanding the market price and available inventory.
→ PRODIG's used iPhone list here / Sale products list / Junk/As-is products list

＼ What are the pitfalls of "1-yen smartphones"? Explaining the mechanisms and precautions behind low prices／