Bottom line: under 5 GB of data, Airalo crushes on price. Unlimited streaming and tethering, Holafly is the safer bet. A buy-without-second-guessing guide for 1-2 week tourists (May 2026, partner sites + real-world measurements).
≤5 GB = Airalo $11 / streaming + tethering = Holafly $27 / 1-2 night stop = Airalo 1 GB $4.50
Airalo sells metered plans (1/5/10/20 GB) and is the cost king for tourists doing maps, SNS, and photo uploads. For the same week in Japan, Airalo 5 GB ($11) is less than half of Holafly's $27 unlimited. On the other hand, when data usage is unpredictable — video streaming, live broadcasting, tethering for 3+ people — Holafly's unlimited is a useful hedge. Both let you install a QR before you fly and connect within a minute of landing. No physical SIM swap.
Airalo bills by data, Holafly by time
Both fine for 4K video; rural areas slow down on both
For 3+ devices, consider pocket WiFi (Ninja WiFi etc.)
Both struggle on remote islands and mountain trails
Need a Japan number? Use Sakura Mobile or SHOGUN SIM
Some Japan-domestic carrier-locked models don't support eSIM — verify first
5 GB is plenty. Airalo 5 GB at $11 is the price champ. Even uploading 20-30 photos to Instagram a day, you'll only burn 3-4 GB over a week. Skip video streaming and 5 GB gives you a comfortable cushion.
Video chews through 1-2 GB per hour. Even 1 hour a day puts you at 14-28 GB in two weeks. Airalo 20 GB ($26) may not be enough. Holafly 15-day unlimited ($47) is the calmer pick.
Tethering means Holafly unlimited. But 3+ people might be cheaper on a Ninja WiFi pocket router (¥400/day × 7 = ¥2,800 vs Holafly $27 ≈ ¥4,000). If three students aren't streaming video, three separate Airalos also works.
Airalo 1 GB at $4.50 is enough. Holafly's shortest plan starts at 5 days ($19) — wasted spend. For Slack + email + maps over a short business trip, 1 GB has headroom.
Live streams burn 3-5 GB per hour. Broadcasting from a tourist spot means Holafly unlimited — no alternative. Note: past the fair-use threshold (~5 GB sustained per day) speeds drop, so pair with WiFi before long sessions.
Airalo 1 GB at $4.50 plus hotel/cafe WiFi can squeeze a week into roughly $5. Download Google Maps offline before you leave. This is the cheapest strategy you'll find.
30-day plans: Airalo 20 GB ($26) vs Holafly unlimited ($69). Different jobs. Heavy video = Holafly, daily use = Airalo. For long stays needing a Japan number, look at Sakura Mobile / SHOGUN SIM instead.
5 GB covers maps 1.5 GB + Instagram 2 GB + WhatsApp 0.3 GB + web 1 GB ≈ 4.8 GB — the typical case. Airalo saves $16 (≈ ¥2,400). Holafly's insurance premium isn't needed.
YouTube + Spotify run 1.5-2 GB per person per day. Two people, 14 days = 42-56 GB. Airalo needs a mid-trip top-up and ends at $37. Holafly is $10 cheaper and you never have to think about quota.
If each person uses a separate eSIM, you buy four. Airalo × 4 at $44 is cheapest but kids burn 5 GB on YouTube fast. Holafly × 4 at $108 is the safe pick. Hidden hack: **one Airalo line + kids tether off one parent** lands at $11 + $26 = $37 — the best value of all.
Zoom meetings eat 1 GB per hour. 2-3 hours online per day = 60-90 GB per month. Airalo isn't enough. For long stays, Holafly unlimited ends up cheaper and stress-free.
It doesn't have to be one or the other: ・**Airalo (5 GB) + hotel / cafe WiFi** = $11 covers a week for the most cost-efficient setup. ・**Airalo (1 GB backup) + main WiFi** = pure WiFi reliance is risky, so keep 1 GB as insurance. ・**Holafly (5 days) + Airalo (5 GB) afterward** = Holafly for the video-heavy first half, switch to Airalo for the lean second half. When neither one is the right answer: ・**3+ person group** → Ninja WiFi pocket WiFi (¥400-600/day) usually wins on total cost. ・**Need a Japan phone number** → Sakura Mobile / SHOGUN SIM (eSIM alone can't issue a number). ・**Phone doesn't support eSIM** → Ninja WiFi or a physical SIM (SHOGUN SIM etc.).
Buy in the app / email before you fly, scan the QR onto your phone, and you're online the moment you land. No physical SIM swap. Best practice: install 48-72 hours before departure (test activation → switch off → switch on after landing).
Raw speeds are almost identical — both ride on Japanese carrier networks. Airalo uses SoftBank; Holafly varies by season (AU / Docomo-leaning). Congestion-time slowdowns show up more on Holafly's unlimited plans (throttled to 5-15 Mbps after fair-use). For everyday use, the difference isn't noticeable.
Strongly recommended. You can install after landing using airport / hotel WiFi, but there's a risk the WiFi doesn't work or is too slow. Best practice: install 48-72 hours before flying → test activation (5 minutes online to confirm) → switch off until departure.
Airalo lets you stack the same plan (a "top-up"). Example: buy Airalo 5 GB, run out, buy 10 GB more, they accumulate. Holafly is unlimited so the question doesn't apply.
iPhone XS (2018) or later, Pixel 4 (2019) or later, Galaxy S20 or later — basically all supported. Check Settings → General → About; if you see an "eSIM" or "Digital SIM" entry, you're good. Caveat: some Japan-domestic carrier-locked models (au / docomo etc.) don't support eSIM — always confirm on the official site before buying.
Not for sightseeing. You need a Japan number for restaurant reservations (some high-end places), SMS authentication (PayPay etc.), Suica top-ups, and similar. If those matter, Sakura Mobile's SIM (eSIM version with a voice number is available) or SHOGUN SIM (Ninja WiFi's physical SIM) is a better fit.
Technically yes (dual-SIM phones). Keep your home SIM on standby and route data through Airalo / Holafly. Risk: your home SIM may still incur roaming charges, so explicitly set "data through this SIM" in settings.
Airalo: full refund within 30 days if unused; none after activation. Holafly: full refund before activation; none after scanning the QR. If you bought the wrong plan, contact support immediately.
Yes. If pre-installed, enable the eSIM profile while in airplane mode on the plane → switch airplane mode off after landing and you're online instantly. No airport WiFi needed, so even late-night / early-morning arrivals connect in under a minute.
Inside mainland China, neither Airalo nor Holafly Japan plans work (due to the Great Firewall). If transiting through China, buy a separate eSIM for China or wait until landing in Japan to activate via airport WiFi.
Both providers void unused data when you leave the coverage area. With Airalo, if you return to Japan within the plan window using the same account, you can keep using it (e.g. buy a 30-day plan, fly home after 7 days, the remaining 23 days work whenever you return). Holafly is stricter since it's time-based.
This page reflects May 2026 partner site information, personal experience, and real-world measurements (Tokyo 23-ward peak hours). Prices, plan structure, and speeds change with seasonal campaigns, so always confirm on the official pages before purchase. Network quality varies by time and place — treat all numbers as guidance.
Last verified: 2026-05-22
Wise and Revolut give you mid-market rates with transparent ~0.5% fees. Roughly ¥6,000 saved on a $1,500 trip. Order before you fly and you'll skip the counter queues entirely.
Also: get online the moment you land
Japan eSIMs from ~$10/week. Install before departure, connect 1 minute after landing.
Get an Airalo eSIM ↗