Is Your Family's Rakuten Mobile Line Count Creeping Up? How to Find and Clean Up Dormant Lines

Good morning. It’s まさきん.

Let me get straight to the point: the more kids you have, the easier it is for extra mobile lines to sneak into your family’s account. Before you know it, you end up with lines nobody can quite explain — “wait, who’s even using this one?”

It’s the kind of thing that quietly chips away at your household budget. Today I want to walk through the exact process my own household used to sort it all out, and it actually worked.

Why family lines tend to multiply

A lot of families get their kids a smartphone when they start school or move up a grade. Some also set up a line for an elderly parent back home, just for peace of mind. And when you switch to a new phone, it’s easy to just leave the old line active instead of canceling it.

This kind of thing tends to pile up especially fast in dual-income households raising kids. Before you know it, the number of lines has crept up without anyone really noticing.

As a marketer, I’d call this a textbook case of “cost that lingers after the thing stops being used.” It’s the kind of cost that builds up slowly, almost invisibly.

Each individual line might only run a few hundred to a few thousand yen a month. But once the contract holder, the actual user, and the payment account are all out of sync, it gets messy. Nobody stops to ask “do we actually still need this?” And so it just keeps sitting there as a fixed cost.

The step-by-step process

Here are the three steps my household actually went through.

1. List out every account and line

First, list out every mobile account registered under your family’s name. It’s common for you, your spouse, and a parent living with you to each have separate IDs.

So start by checking whose name each contract is under, and how many lines are tied to it. I’d recommend starting by putting it all into a single table.

2. Make the gap between contract holder and actual user visible

The thing my household had overlooked the most was exactly this: the gap between whose name a line is under and who’s actually using it. It’s not unusual at all for a kid to be using a line registered under a parent’s name.

But if you’re not aware of this mismatch when you’re tracking your household budget, it can bite you. You lose track of whose usage is actually behind that “communications cost” line item.

Cross-referencing the contract holder and the actual user in one table puts your mind at ease. That way, when it’s time to cancel a line or change a plan later, you already know whose identity verification you’ll need. That alone cuts down on a surprising amount of hassle.

3. Use recent usage data to flag “dormant lines”

Check the usage for each line over the past 1-2 months. Look at data usage and call activity to flag any lines showing no activity at all.

Data-only plans deserve special attention here. With a voice line, you tend to notice fairly quickly if it’s going unused.

Data-only lines are a different story, though. They’re the kind of thing that ends up stuck in some old phone or tablet and then quietly forgotten.

Even at zero usage, the base monthly fee usually keeps getting charged. That’s just how most of these plans are set up.

By this point, you’ve probably uncovered some fixed costs that had been quietly chipping away at your budget. Since you’ve already gone through the trouble of sorting everything out, it might be worth using this as a chance to rethink your family’s lines as a whole.

If you’ve still got lines sitting with other carriers, running the numbers through a rate simulation is worth doing too.

Things to check before you cancel

Even once you’ve found a dormant line, canceling it right away can be premature. Here are a few things I actually checked myself that saved me some headaches.

• Check whether any perks are tied to it: Points or membership benefits are sometimes linked to a specific line. It’s worth checking, before you cancel, whether you can move them to a different account. You might be able to keep the perks that way.
• Make sure it isn’t there on purpose, as a “safety net”: Some lines for elderly parents are kept active on purpose, as a way to have a line open just in case something happens. Rather than deciding based on usage data alone, it’s worth checking in with the person or the rest of the family before you move forward.
• The contract holder will need to verify their identity: If a line’s contract holder is different from its actual user, canceling it requires identity verification from the contract holder themselves. It helps to sort out ahead of time who can actually handle that.

Wrap-up

Because the amounts involved are small, family mobile lines are exactly the kind of thing that gets pushed to the back burner. It’s easy to get stuck at “I’ll deal with it eventually.”

But things change the moment you lay it all out in a single table. Try lining up the contract holder, actual user, payment method, and usage history side by side. Dormant lines turn out to be surprisingly easy to spot.

Data-only lines especially deserve a first look, since they’re often set up to keep charging a base fee even when nobody’s using them.

I’d recommend making this kind of review a habit, say once every six months. It’s a good way to stop fixed costs from quietly piling up without you noticing.

Once you’ve sorted through your lines, one option is consolidating your family onto a single carrier. That alone can make future check-ins a lot easier to do.

In my own household, moving everything over to Rakuten Mobile made managing all of this much simpler. If you’re about to start sorting through your own family’s lines, it’s an option worth considering.

This article contains affiliate advertising. If you sign up for a product or service through a link on this site, we may receive compensation from the partner company. The site operator is also an employee of Rakuten Group and may receive compensation through an employee referral program. The content and opinions here are based on the operator’s own experience and research regardless of any advertising relationship, but please read with the above in mind. See the Disclaimer & Affiliate Disclosure for details. Disclaimer & Affiliate Disclosure

This article includes machine-translated content. Please check the official Rakuten Mobile multilingual page for exact terms.

If you have concerns about Rakuten Mobile coverage or signal quality, you can consult through the official signal improvement request form .