Why is the d Card so strong? The reason why the outdated 'Docomo Shop' transformed into the ultimate financial consulting window

When I look at the Docomo users around me, I always find something strange.

Many of them are subscribed to expensive 'unlimited data plans' even though they don't consume much data every month.

And in their wallets, a high-tier Gold or Platinum d Card, obtained by paying a high annual fee, sits prominently.

'Isn't ahamo enough?' 'A standard card with no annual fee would be cheaper in total.'

Even when I, who compares and verifies the UI/UX of cashless payments and financial services daily, recommend this, they never agree.

The reason is always the same.

'Because this way is more profitable.'

They turn a blind eye to the reality of 'high monthly fixed costs' and look only at the fruit of 'large amounts of reward points' presented before them, completely convinced that they are coming out ahead.

It is precisely this mysterious gravitational pull that skips rational comparison and consideration that hides the true nature of the unique strength that the d Card exerts in the current payment market.

An otherworldly portfolio with a high-tier card ratio of 57.9%

From 2025 to 2026, the Japanese payment market has completely entered a 'full-stack financial infrastructure competition'.

Within that, the d Card's position is clearly different from its competitors.

According to data from the end of 2025, among the segment that uses the d Card as their main card, a staggering 57.9% are holders of high-tier cards such as the d Card GOLD or d Card PLATINUM.

The majority of main users are going out of their way to pay high annual fees.

By the standards of the credit card industry, this is a clear anomaly.

While the PayPay Card is aggressively increasing the number of new cards issued and capturing the 'breadth' of the mass market, the d Card is competing on 'depth' through upsells to existing customers.

And that strategy is working terrifyingly well.

The fact that the d Card PLATINUM, which launched in the fall of 2025 with an annual fee of 29,700 yen, surpassed 1 million members in less than a year is proof of that.

Why do they pay high annual fees? The mechanism of the break-even point

Why do people willingly pay an annual fee of about 30,000 yen?

The answer is extremely simple. It is because users are falling into the 'break-even point illusion' that Docomo is orchestrating.

The biggest hook of the d Card PLATINUM is the 'up to 20% return' on Docomo communication charges and Docomo Hikari.

If a family uses Docomo, it is not rare for monthly communication costs to reach 20,000 to 30,000 yen.

For 300,000 yen in annual communication costs, up to 60,000 points are automatically returned.

At this point, the calculation that 'the annual fee has been recovered' is established in the user's mind.

Once freed from the spell of this sunk cost, human behavior changes.

Furthermore, there is the 'Annual Usage Benefit' provided.

Every time you accumulate payment amounts of 1 million yen or 2 million yen, a luxurious benefit worth 10,000 yen is granted.

When this happens, you feel like you are 'losing out' unless you concentrate all your payments, from daily supermarket shopping to utility bills and home appliance purchases, on the d Card PLATINUM.

Using another company's card is replaced by the penalty of missing out on the opportunity to increase your point rank.

They no longer compare return rates. They just keep making payments toward the goal presented by Docomo.

This is a form of 'abandonment of thought'.

The 'clerk in front of you' over the strongest UI. Redefining physical stores.

Supporting this upselling strategy at its foundation is the physical store network called 'Docomo Shop' spread across the country.

In an era where digital-only services are praised, physical stores that incur rent and labor costs were often seen as 'outdated liabilities'.

However, Docomo is now brilliantly redefining this massive infrastructure into a 'nationwide face-to-face financial consulting window'.

Online securities firms (SBI and Rakuten) captured the younger generation with intuitive UI/UX.

However, there is a huge silent majority in Japan who are 'interested in NISA but afraid to open an account or set up security on their smartphone alone'.

No matter how much you polish an app, this 'wall of financial literacy (chasm)' can never be crossed.

Docomo Shop physically smashed this wall.

The destructive power of selling NISA while changing phone models

In just two years since the partnership between NTT Docomo and Monex Securities, the usage scale of 'd CARD Tsumitate' (installment investment) has exploded to nine times what it was before the partnership.

There is no way these numbers could jump this much just by running online ads.

The trick lies in the field.

When customers visit to change their smartphone models or review their plans, familiar staff members show them a simulation in person, saying, 'Based on your usage, you would save this much in total if you switched to a Platinum card and started investing in NISA.'

Right there on the spot, they guide the customer through everything from linking their d Account to complex security settings like multi-factor authentication, and even the initial purchase operation, looking at the smartphone screen together.

They don't give them a chance to drop out along the way.

While internet companies spend massive amounts on advertising and desperately chase new customers, Docomo is mass-producing financial customers with abnormally high LTV within the extremely natural context of 'smartphone procedures.'

The ultimate UI is not a sophisticated design.

It is 'the trusted staff member right in front of you.'It is.

The final piece: The birth of 'Docomo SMTB Net Bank'

And in the summer of 2026, a huge piece that would complete the Docomo economic zone fell into place.

This was the birth of 'Docomo SMTB Net Bank' following the acquisition of SBI Sumishin Net Bank.

The only thing missing for Docomo, which already had a credit card (the exit) and securities (the investment), was a 'bank' to serve as the entry point for funds.

By seizing this, Docomo has gained the power to completely dominate the user's life infrastructure.

A mechanism is planned to be introduced where designating Docomo SMTB Net Bank as the salary account and having the d CARD PLATINUM payments deducted from it will cause the reward rate to jump even higher.

What is even more frightening is the powerful integration with mortgage loans.

Telecommunications, payments, securities, banking, and mortgage loans.

Users who complete all of these within the Docomo economic zone will find it physically and psychologically impossible to switch to another company.

This is because the effort required to switch is enormous, and the lost interest rate benefits and point rewards would reach tens of thousands to over a hundred thousand yen per year.

Conclusion: What we give up in exchange for convenience

Why is the d Card so strong?

It is not because the card's individual specifications are good.

Starting with communication infrastructure, overcoming the barrier of financial literacy through face-to-face sales at physical stores, and cutting off any retreat with banks and home loans.

It is because this meticulously calculated 'impregnable ecosystem' has been completed.

This is the reason why the Docomo users around me do not even look at other companies' services.

If you entrust everything to Docomo, you don't even need to think about whether it's 'a good deal' anymore.

Liberation from decision fatigue.

For modern people, that is an extremely attractive and sweet temptation.

However, in exchange for that overwhelming convenience, we may be handing over something precious—our 'freedom of choice'—into the giant cage of a platformer.

Thank you for reading until the end.

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