
Staying Reachable on Your Home Number While Using a Japan eSIM
How to run your eSIM and home number side by side, without missing calls or two-factor codes.
A practical comparison of Japan's three major international airports, plus exactly what to handle in your first hour after landing.

If you're flying into Japan, you'll most likely land at one of three airports: Narita or Haneda serving Tokyo, or Kansai serving Osaka and the wider Kansai region. Which one you land at is sometimes a choice (some airlines serve multiple options) and sometimes not, but either way, knowing what to expect makes the first hour of your trip — often the most disorienting hour of the entire trip — considerably smoother.
Narita sits roughly 60 kilometers east of central Tokyo, making it the farther of the two Tokyo airports by a meaningful margin. The Narita Express (N'EX) train connects directly to Tokyo, Shinjuku, and Shibuya stations in about 60 to 90 minutes depending on your destination, and the Keisei Skyliner offers a faster, cheaper alternative to Ueno Station in roughly 40 minutes. Airport limousine buses are also common and drop off directly at many major hotels, trading speed for convenience if you're carrying heavy luggage.
Narita traditionally handled the majority of international long-haul flights into Tokyo, though Haneda has taken on a growing share in recent years. If your itinerary starts in central Tokyo, factor in the extra transit time and cost compared to Haneda when planning your arrival day.
Haneda is significantly closer to central Tokyo — about 20 kilometers, with the Tokyo Monorail and Keikyu Line both reaching central Tokyo stations in 15 to 30 minutes. For travelers whose first stop is central Tokyo, Haneda is generally the more convenient option, cutting a genuinely significant amount of time off an already long travel day.
Haneda has expanded its international terminal capacity substantially, and a growing number of long-haul international flights now route through it rather than Narita. If your airline offers a choice between the two and your first days are in central Tokyo, Haneda's shorter transit time is usually worth prioritizing.
Kansai International Airport, built on an artificial island in Osaka Bay, is the primary international gateway for Osaka, Kyoto, and the broader Kansai region. The JR Haruka Express connects to Osaka's Tennoji and Shin-Osaka stations in around 35 to 50 minutes, with a further extension available to Kyoto Station in about 75 minutes total. The Nankai Airport Express offers an alternative route into Namba, Osaka's southern hub, often at a lower cost than the JR option.
If your trip starts in Osaka or Kyoto rather than Tokyo, Kansai is almost always your arrival airport, and it's worth booking your first night's accommodation with awareness of which train line serves it most directly.
Haneda offers the shortest, cheapest transit into central Tokyo, making it the strongest choice when available for Tokyo-first itineraries. Narita remains a major hub with reliable express train options, worth choosing without much concern if it's your only or cheapest option into Tokyo. Kansai is the natural entry point for Osaka- or Kyoto-first itineraries, with express rail options reaching both cities directly, avoiding the need to route through Tokyo first.
However tired you are after a long-haul flight, a few things are worth handling in order, before you're distracted by finding your hotel.
Get your eSIM connected first. If you installed your Kyoto Mobile eSIM before you flew, this is as simple as switching on data roaming for that line in your phone's settings — it should connect to KDDI's network within a minute or two, giving you working maps and translation before you've even left the arrivals area. This single step removes most of the friction from everything that follows.
Withdraw cash if you need it. Airport ATMs generally accept foreign cards, and it's worth having some yen on hand for your first taxi, vending machine, or small purchase before you've had a chance to find a 7-Eleven in the city.
Pick up your IC card. Suica and Pasmo cards (or their digital wallet equivalents) can typically be set up right at the airport, and having one active before you attempt your first train journey saves you from working out ticket machines with jet lag setting in.
Confirm your train platform before you walk to it. Major airport stations serve multiple lines from platforms that aren't always adjacent, and a quick check on your now-connected phone saves a genuinely common first-trip mistake of boarding the wrong express service.
Which Tokyo airport is better, Narita or Haneda? Haneda is generally more convenient if your first stop is central Tokyo, thanks to its shorter, cheaper transit connections. Narita remains a fine choice, particularly if it's the airport your flight already routes through, since the express train options are reliable either way.
How long does it take to get from Narita to central Tokyo? Around 60 to 90 minutes by Narita Express or Skyliner, depending on your exact destination station, plus time for immigration and baggage claim before you even reach the train.
Should I book my flight into Kansai or a Tokyo airport if I'm visiting both Osaka and Tokyo? It depends on which city you want to visit first. Flying into Kansai and out of a Tokyo airport (or vice versa) is common and often more efficient than routing back through the same airport if your itinerary covers both regions.
Can I set up my eSIM at the airport if I didn't do it before flying? Yes, as long as you have airport Wi-Fi to download the profile, though it's slower and less reliable than doing it at home before your flight, particularly with a tired brain and unfamiliar Wi-Fi login screens to navigate.
Which airport you land at shapes your first few hours in Japan more than most travelers expect, and knowing the transit options in advance turns what's often the most disorienting part of a trip into a fairly routine sequence of steps. Whichever of the three you land at, having your Kyoto Mobile eSIM already installed and ready to activate means the very first thing you do after clearing customs is get online — not search for Wi-Fi or a SIM counter — so everything after that, from finding your train platform to hailing a taxi, is that much easier.
Get a Japan eSIM that activates in minutes on KDDI's network - no SIM swap, no roaming fees.

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You don't need fluency — a handful of phrases plus a good translation app covers almost everything.