Alternative

A Holafly alternative for Japan: what "unlimited" really means on each plan

Disclosure: ESIM KIMONO is our store. Competitor facts come from their own pages and public reviews, checked 13 October 2026, each linked.

Short answer: almost every "unlimited" Japan eSIM limits something. Some give a daily full-speed allowance, some a total allowance, Holafly uses a fair-use threshold it doesn't publish, and ESIM KIMONO uses one flat 10 Mbps cap on KDDI with no daily data cap. Pick the kind of limit that fits how you actually use data, and you won't be surprised on day four.

Why does the kind of limit matter?

Two people in Kyoto share one phone's hotspot. By evening in Gion, one tablet is uploading the day's photos, the other is on a video call home, and the connection crawls. The map back to the guesthouse won't load. They hit a limit they couldn't see.

Holafly is a common pick for that couple, with a lot going for it: a 4.7 TrustScore from 114,820 Trustpilot reviews, only 7.4% of them 1-2 star (Trustpilot). But some travelers report this:

"Internet speed is around 1,5 Mb/s (download)... it barely works for google translator." (Trustpilot, May 2026)

Holafly's hotspot is capped at 1GB a day (Holafly), and one customer who asked support for the throttle threshold was told it "cannot be shared" (r/eSIMs).

What is the real limit on each unlimited plan?

Provider	Network	The real limit	Hotspot	Source
Holafly	KDDI / SoftBank	Fair usage may slow speed "for no more than one (1) day"; threshold not published	1GB per day	holafly
Airalo	SoftBank + 1 other	3GB per 24h at full speed, then 1 Mbps for the rest of that 24h	Allowed, counts toward the 3GB	Airalo FUP
Saily	KDDI and SoftBank	5GB per day at full speed, then up to 1 Mbps	"Limitless hotspot sharing"	saily.com
Ubigi	NTT Docomo and KDDI	25GB at full speed per 7-day plan, then 2 Mbps	Data sharing allowed (our 26 Sep check)	Ubigi plan page
Nomad	KDDI au / SoftBank	Daily high-speed allowance, then 512 kbps; a review puts it at 2GB a day	Not stated in the page text	nomadesim.com, review
ESIM KIMONO	KDDI 4G/5G	Flat 10 Mbps from the first minute, no daily data cap	Most plans; each plan's rule printed at checkout	/fup/

In short: Airalo and Saily are fastest for your first few GB a day, Saily is the most hotspot-friendly on paper, Ubigi is the only Docomo option, and ours is the most predictable: one number, the same speed at 9pm as at 9am.

Which limit fits how you use data?

"I use a lot at once, then very little." A total allowance suits you: Ubigi's 25GB lets you burst at full speed. Daily allowances punish one huge evening. Our 10 Mbps handles it, just slower than full 5G.

"I use a steady amount all day." A flat cap suits you, because there is no point in the day where you suddenly slow down. That is why ours is built this way. Saily's 5GB a day also works if you stay under it.

"I share with a partner or a laptop." Holafly caps hotspot at 1GB a day; Airalo counts it toward the 3GB. On ours, hotspot shares the 10 Mbps: fine for email, slow for a heavy work day. Saily advertises limitless sharing. For laptop-heavy trips, a large fixed plan at full network speed beats any unlimited plan.

"I'm staying longer than a month." Holafly sells plans up to 90 days (Holafly). That is a genuine strength.

What do Holafly users complain about, and what do we do?

Of 9 recent Japan-specific 1-2 star reviews (13 October 2026), 7 were about slow speed with full signal and 2 about long support chats. Quotes with links are on our Holafly comparison.

Slow even with full bars. We can't promise any speed beyond our network and our cap. We do promise no hidden threshold: a flat 10 Mbps on KDDI, a network we name.
A threshold that "cannot be shared". Our whole rule is one sentence, shown before you pay.
Hours in chat while stuck. Real humans answer chat and [email protected], and our five-step rescue card fixes most "No Service" screens.
A refund that depends on reporting mid-trip. A faulty eSIM is replaced one for one, and unused plans are refunded under package terms (/help/).

Who stands behind ESIM KIMONO?

ESIM KIMONO is run by Fizen LLC. Fizen.io has 500,000+ app users and a strategic investment from Tether. The plan runs on KDDI, a licensed Japanese carrier, using a GSMA standard eSIM profile. Payments go through Stripe, PCI DSS Level 1. The QR arrives by email within minutes, no account, no app. Data only, no phone number.

Already on Holafly in Japan and it's slow? Do this tonight

Check settings: Data Roaming on for the Holafly line, Holafly as the data line, airplane mode on for 10 seconds, then restart.
Try a manual network. Turn off automatic selection and try KDDI and SoftBank in turn.
Contact Holafly during the trip. Its refund policy says they "cannot guarantee a refund if you contact us after your trip." Screenshot a speed test.
If you need a working connection now, buy a second eSIM over hotel Wi-Fi, install it from a second screen and switch your data line. Leave Holafly installed: its policy says an installed eSIM "can't be transferred or reinstalled".

FAQ

What is a good Holafly alternative for Japan?

It depends on the limit you can live with. Steady use: ESIM KIMONO, flat 10 Mbps with no daily cap. Bursty use or Docomo coverage: Ubigi, 25GB then 2 Mbps. Heavy hotspot: Saily advertises limitless sharing. Over a month: stay with Holafly.

Is any Japan eSIM truly unlimited with no limits?

We didn't find one. Each limits something: a daily or total full-speed allowance, an unpublished fair-use threshold, or, on ours, a flat speed cap.

How does ESIM KIMONO's price compare with Holafly?

We don't compete on price. Plans are priced for a carrier-grade network and a human who answers. Today's price is on the button below.

Does ESIM KIMONO allow hotspot on unlimited?

Most plans allow it, and each plan prints its own rule at checkout. Hotspot traffic shares the 10 Mbps cap.

Can I keep Holafly and another eSIM at the same time?

Yes. Keep both installed and choose which one carries data.

All Japan plans

Competitor facts on this page were checked on 13 October 2026 on their own pages. The button above shows today's price.