Superalink 7 cheapest rows

Japan Wireless vs Superalink in Japan

Side-by-side pricing for Japan, straight from each provider's current real plans.

Japan Wireless

1/8 cheapest rows

Fully verified 12 of 12 facts confirmed Score 68/100 -15%

Best for: Unlimited data · No ID check · Short trips · Long stays

View plans Visit ↗

Cheapest overall

Superalink

7/8 cheapest rows

11 of 12 facts confirmed Score 74/100 -20%(Unlimited plans only)

Best for: Unlimited data · Multi-country trips · Short trips · Long stays

View plans Visit ↗

Superalink is the cheapest option in 7 of the 8 price rows for Japan. The remaining rows go to Japan Wireless. Live plans from each provider's catalog, re-checked daily.

Prices in Japan

Cheapest live plan from each provider per trip size. Every price links to that exact plan.

	Japan Wireless	Superalink
Starting price	$5.20 Unlimited · 1 days Get eSIM →	$0.63 100MB · 1 days 🌍 Regional Also valid in: South Korea Get eSIM →
1 GB or more	$5.39 1GB · 3 days Get eSIM →	$0.75 1GB · 1 days 🌍 Regional Also valid in: South Korea Get eSIM →
5 GB or more	$8.86 5GB · 3 days Get eSIM →	$3.71 5GB · 1 days 🌍 Regional Also valid in: South Korea Get eSIM →
10 GB or more	$11.36 10GB · 3 days Get eSIM →	$7.36 10GB · 1 days 🌍 Regional Also valid in: South Korea Get eSIM →
20 GB or more	$20.03 30GB · 7 days Get eSIM →	$14.92 20GB · 2 days 🌍 Regional Also valid in: South Korea Get eSIM →
Unlimited	$5.20 Unlimited · 1 days Get eSIM →	$0.79 Unlimited · 1 days Get eSIM →
Best price/GB	$0.67	$0.73
Best price/day	$0.31	$0.03

Comparison by eSIMKart

Starting price

Japan Wireless

$5.20

Unlimited · 1 days

Get eSIM →

Superalink

$0.63

100MB · 1 days

Get eSIM →

1 GB or more

Japan Wireless

$5.39

1GB · 3 days

Get eSIM →

Superalink

$0.75

1GB · 1 days

Get eSIM →

5 GB or more

Japan Wireless

$8.86

5GB · 3 days

Get eSIM →

Superalink

$3.71

5GB · 1 days

Get eSIM →

10 GB or more

Japan Wireless

$11.36

10GB · 3 days

Get eSIM →

Superalink

$7.36

10GB · 1 days

Get eSIM →

20 GB or more

Japan Wireless

$20.03

30GB · 7 days

Get eSIM →

Superalink

$14.92

20GB · 2 days

Get eSIM →

Unlimited

Japan Wireless

$5.20

Unlimited · 1 days

Get eSIM →

Superalink

$0.79

Unlimited · 1 days

Get eSIM →

Best price/GB

Japan Wireless

$0.67

Superalink

$0.73

Best price/day

Japan Wireless

$0.31

Superalink

$0.03

Comparison by eSIMKart

Networks in Japan

Japan Wireless: KDDI5G/4G NTT Docomo4G
Superalink: Not listed

Plan types sold for Japan

Japan WirelessSuperalink Unlimited data ✓ ✓ Regional bundles — ✓ Global bundles (50+ countries) — — Pay as you go — —

Policies compared

Confirmed from each provider's own site — see the trust card on each provider page for the verification date.

ID verification

Japan Wireless: Not required

Superalink: Not confirmed yet

Refund policy

Japan Wireless: eSIM orders can't be cancelled or refunded once dispatched (erroneous shipments excepted); pocket WiFi rentals cancel free before shipment.

Superalink: Refunds only if the eSIM has not been activated and no data has been used; QRIS purchases must be requested within 7 days of purchase.

Validity starts

Japan Wireless: Validity starts when the eSIM is actually activated, not at purchase, counted in 24-hour days; it must be activated within 30 days of purchase or it expires.

Superalink: Starts once the eSIM installs and connects to the local network at your destination — activation from home is possible, but Superalink recommends waiting until arrival; data isn't deducted until it connects there.

Fair-use limit

Japan Wireless: 4G Unlimited (DOCOMO) throttles to 256kbps after 3GB/day, resetting at midnight JST; 5G Unlimited (KDDI) has a general fair-use policy with no fixed daily cap stated.

Superalink: On Unlimited plans, speed drops for the rest of the day once the daily high-speed allowance is used (no extra charge, resets the next day): 10GB/day to 5 Mbps, 5GB/day to 1 Mbps, 500MB-3GB/day to up to 384 Kbps.

Top-ups & rollover

Japan Wireless: Existing eSIMs cannot be topped up; extra data requires purchasing a new/additional data plan, per Japan Wireless's own FAQ.

Superalink: Enter your eSIM's ICCID on Superalink's Top Up page (My Voucher) to add data or extend — no reinstall needed, though it only becomes available once the current package's validity ends or its data runs out.

Support

Japan Wireless: Live chat · Email · Phone · 7 days a week, support team based in Japan

Superalink: Live chat · Email · WhatsApp · Help center · 24/7

Comparison by eSIMKart