Using a smartphone as a visitor to Japan

I just landed in Narita and came to my friend’s apartment in Koenji, Tokyo last night, coming to Japan for the first time since I finished graduate school last March, and for the very first time as a tourist and not a resident.

I had been looking at the options for having at least some basic mobile phone service, as I have been able to arrange cheaply in every other country I have previously visited, but the solutions in Japan are less straightforward, or at least less obvious. (On a tangent, this article about the state of Internet access in the remote island territory of American Samoa is pretty neat.) I DID find an option that works well, but it took a little bit of poking around and some minor hoops.

For example, in Taiwan I had no trouble getting a prepaid SIM card by showing my passport, here in the US (somewhat surprisingly, with all the Patriot Act and related security in recent years) you can still buy a prepaid phone or SIM, and on my first visit to the Philippines I actually got a SIM card out of a vending machine! While it has always1 been easy for a resident foreigner to sign up for a mobile phone contract, the providers will quite understandably not offer a one or two year contract to somebody who is only legally allowed to remain in the country for 90 days.

While Japan has long had perhaps the best wireless communications infrastructure in the world, it also has some of the least flexible ways to register for service. While prepaid SIM cards for voice and/or data are the norm, or at least commonly available, in most countries, such options are far more limited in Japan, and those that do exist tend to be unavailable to temporary visitors.((Prepaid service is very widely available in the US, for both voice and data, and although still not very popular overall is gaining fast in popularity.)) Options for international data plans do exist, but even the better deals fall between pretty expensive and ruinously expensive. (The NY Times just had a post discussing some other options.)

Prepaid phone service does exist, offered  companies such as au or Softbank, but for some bizarre reason these are still structured as one year contracts, and are therefore also not available to visitors. For example, if you look at Softbank’s page explaining how to register for pre-paid service, it clearly states that one needs either proof of Japanese citizenship or visa that has over 90 days remaining. It is certainly possible for a visitor to have a friend in Japan to arrange service for them, but that is not only kind of a hassle for both parties, but also may not be an option for visitors who do not (yet?) have friends in the country.

Perhaps the most popular option for foreign tourists is Softbank’s Global Rental service, which will rent either a Japanese phone or a SIM card for use with an unlocked 3G phone. The prices for this service are not too egregious for very light use, with a bare SIM costing for ¥105/day, ¥105 per minute for outgoing calls, and ¥15 per domestic SMS. Incoming calls and texts are free, like in basically every country outside of North America. Data, however, is another matter. Although Softbank thankfully caps the data charge for a single day to ¥1500, it takes only slightly more than 1 megabyte to reach that level, which means that any smartphone that sees even minimal use will incur ¥1605/day, plus whatever you spend on phone calls or texts. I don’t know about you, but ¥48,150+ seems like a lot to pay for one month of using my smartphone on a trip to Japan.

But there is a much, much better option.

Enter B-Mobile. B-Mobile is a MVNO, or Mobile Virtual Network Operator, which means that in contrast to wireless service providers such as NTT Docomo, KDDI AU or Softbank, they do not own any infrastructure of their own but instead purchase access to a wireless network at the wholesale level from the physical network providers, in this case from Docomo, and then re-sell it to retail customers in packages that the original network provider does not offer.

As soon as I stepped off the airport bus outside Shinjuku Station I walked across the street to Bic Camera and asked the first staff member I saw in the mobile phone area where the B-Mobile products were. She had no idea what I was talking about, and after running to check told me that they didn’t have any (申し訳ございませんが、当店では取り扱っておりません), but I suspected she was wrong and asked a man in a spiffier uniform. He immediately took me over to the counter and grabbed a box from the shelf behind it. For those looking to purchase these SIM cards in a store, note that they do not seem to be on display; you have to find someone who knows where they are kept in the back. I chose the 1GB/1 month 3G/4G option, for just under ¥3500, and purchased it along with an external battery pack for my phone.

Note that it is possible to order these SIMs online, using either a credit card or by COD((Younger American readers may not even know that COD means Cash On Delivery, which is something that used to be possible for mail order products, but now is pretty much restricted to delivery food. Japan is actually safe enough that when I ordered a ¥100,000 digital camera from Amazon some years back they let me pay COD.)) The downside of this, for many foreigners, is that the page is only in Japanese, as is the activation directions. If you do not read and speak Japanese, you may need someone else to help with ordering and configuring the setup.

Before I explain the annoying caveats, I will state upfront that it works great once configured, so you know this isn’t a waste of time.

I stepped out of the store and grabbed a coffee and a seat at the Starbucks just below. Popping the SIM card into my phone, an unlocked GSM/HSPA+ Galaxy Nexus and rebooting it did not give me any immediate results, only showing the notification screen message “EMERGENCY CALLS ONLY [NTT DOCOMO]”, which I had even with my American T-Mobile SIM installed.

After looking at the packaging I realized that it needed to be activated by phone, but this presented a minor obstacle. For some reason, the activation can be done one of two ways, either by calling from a Japanese mobile phone, or by calling a help-desk and paying a ¥2,500 handling fee. I nearly considered doing the latter just to get going… but the helpdesk closes at 6pm, an hour earlier.

I then switched tactics slightly and pulled out my laptop, a recently purchased 15″ Retina Macbook Pro, to try the Starbucks WiFi. I was under the impression that it was a pay service as it had been years before, and was ready to begrudgingly spend a few hundred yen to get online for an hour, but was pleased to see that they have switched to a free service at some point. I was much less happy to see, however, that in order to use the free Starbucks WiFi, you have to register for a login account, which cannot be done from the login page. Yes, that’s right. To use the free WiFi you have to register in advance while already connected to the Internet. For your reference, the address for doing this is Do yourself a favor and register right now, even if you don’t expect to be using it anytime soon. Thankfully I was sitting next to a young Japanese fellow in a standard black suit, who was kind enough to lend me his smartphone for a minute to register myself an account and get online.

After I had both my laptop and phone connected to the free WiFi, I found a Japan-resident friend on Gchat and asked her to use her mobile phone to call and register my B-Mobile SIM, providing her with the unique registration code included on a slip of cardboard. Make sure not to lose that! (Incidentally, the SIM itself is a DOCOMO card, with B-Mobile branding used only on the packaging.) I suppose I could have done that call with the phone I borrowed from my Starbucks neighbor, but with the mention of a ¥2500 surcharge for using the helpdesk, I figured it would be rude to risk some unexpected charge on the phone bill going to a total stranger, rather than a friend I can repay in the event that it happens.

After spending another half-hour or so at the Starbucks before I was able to get in touch with the friend whose apartment in Kouenji I am staying at in Tokyo there was still no indication that my SIM card had been activated, even after rebooting again. It was on some pretty solid WiFi, so I was unsurprised to maintain Internet service for a little while after leaving the Starbucks, but when I glanced at my phone to check the time while waiting for the train and noticed that it appeared to still be signed into Gchat I was rather confused.

You see, although the phone appeared to have no mobile network service, it was in fact connected, and may very well have been connected the entire half-hour I spent waiting in the cafe. Very weirdly, it has a constant notification saying “NO SERVICE: Selected network (DOCOMO) unavailable”, while also constantly showing zero bars for my mobile network connection. And this is despite having a perfectly good Internet connection, even good enough for me to make and receive Skype calls.

Presumably this is because the OS, configured as it is for a phone rather than a tablet, is puzzled by an account that has data service, but is not allowed to place or receive calls, and therefore fails to display the proper indicator. This surprised me, as the same Android OS is also running on tablets, such as the Nexus 7, that also support SIM cards and HSPA+ data connections. Presumably on a Nexus 7 or similar device the mobile network indicator properly indicated when it is connected, and doesn’t harass you about not having voice service, so I wonder if there may be a way to tweak the phone version to fix this minor bug. After all, it is a little bit annoying not knowing whether or not you are connected until you try and access the Internet and either succeed or fail.

One final note for now is that this particular card provides 1GB of data or one month of service, which ever comes first. 1GB may not sound like all that much, but Android 4.x has extremely good tools for tracking and limiting your data usage, and if you are sensible enough to streaming media or file downloads while not connected to WiFi, I would not be at all surprised to see 1GB last for an entire month.

  1. At least since the first time I was in Japan, in 2002. []

17 thoughts on “Using a smartphone as a visitor to Japan”

  1. Nice to see your plan worked!

    This looks like a good solution for someone who is either staying for a moderate amount of time or makes frequent trips to Japan. But for a tourist staying no more than say a week or so it seems like it might not be worth the hassle, and a total non-starter for non-Japanese speakers without the proper assistance. Of course, if B-Mobile noticed this it could actually offer this option as an upfront promotion for foreign visitors.

    After my issues using a Mifi for connectivity during my ongoing visit home for Thanksgiving, I am considering getting some kind of unlocked phone for my next device so I can switch SIMs across countries like you did.

  2. Bottom line – always ask the man in the spiffier uniform.

    Hopefully someone will start renting out these newish WiMax personal wireless routers to tourists as they can get you online on all of your devices.

  3. FWIW, a Bangladeshi acquaintance of mine (who used to be on “Koko ga hen da yo nihonjin”) is running a company which supposedly offers mifi rentals to tourists for a flat 4,500 yen/month plus a 10,000 yen deposit for the device. For some reason, he only posted the offer on his personal facebook page and not on his company’s website… which is here:

  4. You can avoid the hassle of registration by using a pre-registered “Visitor SIM” from B-mobile (downside is those are either limited to 1GB of data or to slow speed – but the 1GB one is still pretty good):

    Also, Japan Mobile tech has a neat comparison of all available b-mobile SIMs (and others):

    What bugs me is: It is still impossible for a non-resident to buy a pre-paid sim card that offer both voice and data. Which means the only options if you want data and voice are either rental or roaming and these are prohibitively expensive.

    The mobile Internet situation in Japan is much better than what it used to be (let’s not talk about access to “free” wifi) but Japanese government/regulators chose to make it impossible for non-resident to ever have access to a Japanese number or voice service.

    As described in your post, in most countries, getting temporary voice and data service through pre-paid sim cards has been made as convenient as possible, in Japan, they went the opposite way and chose to forbid it.

    (since this comment contains many links, I’ve changed http to hxxp to avoid any spam filter).

  5. Totally off topic but Chad, your post reminded me that BOTH Build & Analyze and Hypercritical are ending. What the hell man

  6. As AKKY mentioned, there are solutions but many just treat the symptoms. The real problem is that the phone (by design) boosts power to the cellular radio because it thinks it has no connection when in fact it does. The Docomo SIM cards provided to the MVNOs all lack a particular component related to the voice network. Most mobile operators include this component in the data-only SIMs they provide to MVNOs. Docomo doesn’t. You could speculate on why this is. Are they reducing cost by omitting a technically unneeded part? Or are they doing it purposely because they’re pissed that they were forced (through MIC arbitration) to allow MVNOs open access at equal terms?

    Anyway, an app that forces signal bars to display might not fix the real problem: massive battery drain.Check your battery stats and you’ll see that “cell standby” will likely be near the top of the list. You may be lucky to get 4 hours out of your battery, but at least it’ll keep you warm as it burns a hole in your pocket. 😉

    I see that one of AKKY’s links includes the patch created by oov. If you don’t mind rooting your phone (if you haven’t already), this is the best solution. I’ve implemented it on tons of phones: Nexus One, Nexus S, Galaxy Nexus, HTC Desire … and probably others I’m forgetting about.

    I described it here in English. (I also provided the English localization and, yeah I know there’s at least one typo.)
    data-only SIM battery drain fix.

    If you don’t want to deal with setting up an appropriate environment but are interested in doing it, let me know. If you are still in Tokyo, I can give you a hand. What phone are you using these days?

  7. I was laughing at your Starbucks story. That’s so Japan. When I was there, I signed up for one of those wifi services that you can use at Maccas etc for my phone but then realised I needed to download the app… and, of course, couldn’t do that without wifi.

    I actually found the easiest option for me in Japan was using international roaming because I had loads of free credit on my Australian phone. It cost me next to nothing to send a txt and that’s mainly what I needed anyway.

  8. The last time I went to Japan for a visit, I rented a phone. It arrived in the mail within a day and wasn’t too expensive. I found the service quite convenient, but it definitely has its limitations. Nice to know there’s another option.

  9. Very affirming. Thanks for posting this. I somehow stumbled upon B-Mobile 3g/4g 1G prepaid SIMs myself at Yodobashi, in Akihabara (Docomo was the only name that was familiar and they happened to also have B-Mobile SIMs) and bought one for an iPhone 4 and an iPhone 4S.

    Next time, I’ll pick up the preregistered one at the airport though. The $25 registration fee is a little excessive.

  10. Thank you so much for this very informative post! I’ve read article after article on the subject of cell/internet service for short-term visitors and have never been able to fully understand the problems, solutions, or options. I feel like I’ve finally got a handle on it. 🙂
    Thanks especially for the Starbucks Wifi link; I’m traveling to Japan soon and was intending to rely on places like Starbucks for a connection, but had no idea that one needed an account to login, let alone how easy it would be to sign up from here in the states! Very helpful, thank you!

  11. Excellent tips, you’re a saviour! I felt really frustrated sitting at my laptop the whole day trying to figure out how to get a simple prepaid sim card. I’m travelling to Tokyo for 5 days and the only reason I’d wanted some call credit is that I need to keep in touch with my brother who’s also heading there but on a different flight and both of us are traveling there for the first time. I also had a hard time deciphering ways to travel from Narita to Tokyo, but that’s another story. Thanks very much for your help! – Nisa, Singapore

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