Cheapest plan with 7+ days & 3GB+ (5GB+ from 15 days, 10GB+ from 180 days) from each provider, next to ByteSim's $4.50. Compare any two in Japan side by side.

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$2.22 −51% ESIMKART10

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$2.24 −50% ESIMKART10

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$2.32 −48% ESIMKART

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$2.39 −47% ESIMK0000

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$2.49 −45% ESIMKART5

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Stellar eSIM

$2.51 −44%

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About ByteSim

10 of 12 facts confirmed

Still researching: Legal entity · ID verification

Founded: 2022
Headquarters: Wan Chai, Hong Kong
Website: bytesim.com
Refund policy: Full or partial refund for connection issues, depending on the situation; no cancellation fees and a money-back guarantee (ByteSIM FAQ). Full terms are on their Refunds Policy page. Read the policy ↗
Validity starts: Most plans start when the eSIM first connects to a network at the destination; some start on a selected date, in the app or (e.g. the Giffgaff UK eSIM) from purchase, as stated on the product page. Installing early usually does not start the plan; some QR codes must be used within 180 days.
Fair-use limit: Unlimited plans may be subject to a local operator fair-use policy: heavy use in a short period can be temporarily slowed or deprioritised (1080p streaming still possible), lifted the following day. The per-plan speed policy is stated on each product page.
Top-ups & rollover: No top-ups or extensions: data on an existing eSIM cannot be renewed; buy a new eSIM when you need more (ByteSIM FAQ: not supported due to the anonymous nature of their eSIM products).
Lost device / reinstalling: A QR code binds to the first phone that scans it and cannot be scanned by another; most profiles are not transferable or reinstallable after deletion, so contact support before changing or resetting a phone (depends on the plan). A lost QR code can be viewed again in the app.
Billing currency: Prices and checkout are in USD for every storefront country (the site's country selector lists USD $ throughout).
Support: WhatsApp · Email · Help center · 24/7
Payment: Apple Pay · PayPal

Facts verified on Oct 7, 2026 from ByteSim's own site

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#	Data	Duration	Daily cap	Price/GB	Price/day	Price
1	Compare Best unlimited Unlimited 500MB/day	1 days	500MB/day	—	$2.90/day	$2.90 $2.90 $2.76	Get eSIM
2	Compare Unlimited 500MB/day	3 days	500MB/day	—	$0.97/day	$2.90 $2.90 $2.76	Get eSIM
3	Compare Unlimited 1GB/day	1 days	1GB/day	—	$2.90/day	$2.90 $2.90 $2.76	Get eSIM
4	Compare Unlimited 500MB/day	5 days	500MB/day	—	$0.70/day	$3.50 $3.50 $3.33	Get eSIM
5	Compare Unlimited 1GB/day	3 days	1GB/day	—	$1.17/day	$3.50 $3.50 $3.33	Get eSIM
6	Compare Unlimited 2GB/day	1 days	2GB/day	—	$3.90/day	$3.90 $3.90 $3.71	Get eSIM
7	Compare 3GB	3 days	—	$1.30/GB	$1.30/day	$3.90 $3.90 $3.71 $1.30/GB	Get eSIM
8	Compare Unlimited No daily cap	1 days	No daily cap	—	$3.90/day	$3.90 $3.90 $3.71	Get eSIM
9	Compare Best price Unlimited 500MB/day	7 days	500MB/day	—	$0.64/day	$4.50 $4.50 $4.28	Get eSIM
10	Compare 3GB	5 days	—	$1.50/GB	$0.90/day	$4.50 $4.50 $4.28 $1.50/GB	Get eSIM
11	Compare Unlimited 1GB/day	5 days	1GB/day	—	$0.98/day	$4.90 $4.90 $4.66	Get eSIM
12	Compare Unlimited 2GB/day	3 days	2GB/day	—	$1.63/day	$4.90 $4.90 $4.66	Get eSIM
13	Compare Unlimited 3GB/day	1 days	3GB/day	—	$4.90/day	$4.90 $4.90 $4.66	Get eSIM
14	Compare 3GB	7 days	—	$1.63/GB	$0.70/day	$4.90 $4.90 $4.66 $1.63/GB	Get eSIM
15	Compare 3GB	10 days	—	$1.73/GB	$0.52/day	$5.20 $5.20 $4.94 $1.73/GB	Get eSIM
16	Compare 3GB	15 days	—	$1.83/GB	$0.37/day	$5.50 $5.50 $5.23 $1.83/GB	Get eSIM
17	Compare Unlimited 500MB/day	10 days	500MB/day	—	$0.59/day	$5.90 $5.90 $5.61	Get eSIM
18	Compare Unlimited 1GB/day	7 days	1GB/day	—	$0.84/day	$5.90 $5.90 $5.61	Get eSIM
19	Compare Best price/day 3GB	30 days	—	$1.97/GB	$0.20/day	$5.90 $5.90 $5.61 $1.97/GB	Get eSIM
20	Compare 5GB	3 days	—	$1.18/GB	$1.97/day	$5.90 $5.90 $5.61 $1.18/GB	Get eSIM
21	Compare 5GB	5 days	—	$1.24/GB	$1.24/day	$6.20 $6.20 $5.89 $1.24/GB	Get eSIM
22	Compare 5GB	7 days	—	$1.30/GB	$0.93/day	$6.50 $6.50 $6.18 $1.30/GB	Get eSIM
23	Compare Unlimited 3GB/day	3 days	3GB/day	—	$2.30/day	$6.90 $6.90 $6.56	Get eSIM
24	Compare 5GB	10 days	—	$1.38/GB	$0.69/day	$6.90 $6.90 $6.56 $1.38/GB	Get eSIM
25	Compare 5GB	15 days	—	$1.44/GB	$0.48/day	$7.20 $7.20 $6.84 $1.44/GB	Get eSIM
26	Compare 5GB	30 days	—	$1.50/GB	$0.25/day	$7.50 $7.50 $7.13 $1.50/GB	Get eSIM
27	Compare Unlimited 500MB/day	15 days	500MB/day	—	$0.53/day	$7.90 $7.90 $7.51	Get eSIM
28	Compare Unlimited 2GB/day	5 days	2GB/day	—	$1.58/day	$7.90 $7.90 $7.51	Get eSIM
29	Compare 10GB	3 days	—	$0.85/GB	$2.83/day	$8.50 $8.50 $8.08 $0.85/GB	Get eSIM
30	Compare Unlimited 1GB/day	10 days	1GB/day	—	$0.89/day	$8.90 $8.90 $8.46	Get eSIM
31	Compare Unlimited 5GB/day	3 days	5GB/day	—	$2.97/day	$8.90 $8.90 $8.46	Get eSIM
32	Compare 10GB	5 days	—	$0.95/GB	$1.90/day	$9.50 $9.50 $9.03 $0.95/GB	Get eSIM
33	Compare Unlimited 500MB/day	20 days	500MB/day	—	$0.50/day	$9.90 $9.90 $9.41	Get eSIM
34	Compare 10GB	7 days	—	$0.99/GB	$1.41/day	$9.90 $9.90 $9.41 $0.99/GB	Get eSIM
35	Compare Unlimited 2GB/day	7 days	2GB/day	—	$1.56/day	$10.90 $10.90 $10.36	Get eSIM
36	Compare Unlimited 3GB/day	5 days	3GB/day	—	$2.18/day	$10.90 $10.90 $10.36	Get eSIM
37	Compare Unlimited 10GB/day	3 days	10GB/day	—	$3.63/day	$10.90 $10.90 $10.36	Get eSIM
38	Compare 10GB	10 days	—	$1.09/GB	$1.09/day	$10.90 $10.90 $10.36 $1.09/GB	Get eSIM
39	Compare Unlimited No daily cap	3 days	No daily cap	—	$3.63/day	$10.90 $10.90 $10.36	Get eSIM
40	Compare 10GB	15 days	—	$1.15/GB	$0.77/day	$11.50 $11.50 $10.93 $1.15/GB	Get eSIM
41	Compare Unlimited 1GB/day	15 days	1GB/day	—	$0.79/day	$11.90 $11.90 $11.31	Get eSIM
42	Compare 10GB	30 days	—	$1.19/GB	$0.40/day	$11.90 $11.90 $11.31 $1.19/GB	Get eSIM
43	Compare Unlimited 30GB/day	3 days	30GB/day	—	$4.63/day	$13.90 $13.90 $13.21	Get eSIM
44	Compare Unlimited 500MB/day	30 days	500MB/day	—	$0.50/day	$14.90 $14.90 $14.16	Get eSIM
45	Compare Unlimited 2GB/day	10 days	2GB/day	—	$1.49/day	$14.90 $14.90 $14.16	Get eSIM
46	Compare Unlimited 3GB/day	7 days	3GB/day	—	$2.13/day	$14.90 $14.90 $14.16	Get eSIM
47	Compare Unlimited 5GB/day	5 days	5GB/day	—	$2.98/day	$14.90 $14.90 $14.16	Get eSIM
48	Compare Unlimited 1GB/day	20 days	1GB/day	—	$0.80/day	$15.90 $15.90 $15.11	Get eSIM
49	Compare Unlimited No daily cap	5 days	No daily cap	—	$3.18/day	$15.90 $15.90 $15.11	Get eSIM
50	Compare 20GB	3 days	—	$0.85/GB	$5.63/day	$16.90 $16.90 $16.06 $0.85/GB	Get eSIM
51	Compare 20GB	5 days	—	$0.88/GB	$3.50/day	$17.50 $17.50 $16.63 $0.88/GB	Get eSIM
52	Compare Unlimited 10GB/day	5 days	10GB/day	—	$3.58/day	$17.90 $17.90 $17.01	Get eSIM
53	Compare 20GB	7 days	—	$0.90/GB	$2.56/day	$17.90 $17.90 $17.01 $0.90/GB	Get eSIM
54	Compare 20GB	10 days	—	$0.93/GB	$1.85/day	$18.50 $18.50 $17.58 $0.93/GB	Get eSIM
55	Compare 20GB	15 days	—	$0.95/GB	$1.26/day	$18.90 $18.90 $17.96 $0.95/GB	Get eSIM
56	Compare Unlimited 5GB/day	7 days	5GB/day	—	$2.84/day	$19.90 $19.90 $18.90	Get eSIM
57	Compare Unlimited 2GB/day	15 days	2GB/day	—	$1.39/day	$20.90 $20.90 $19.85	Get eSIM
58	Compare Unlimited 3GB/day	10 days	3GB/day	—	$2.09/day	$20.90 $20.90 $19.85	Get eSIM
59	Compare 20GB	30 days	—	$1.05/GB	$0.70/day	$20.90 $20.90 $19.85 $1.05/GB	Get eSIM
60	Compare Unlimited No daily cap	7 days	No daily cap	—	$3.13/day	$21.90 $21.90 $20.81	Get eSIM
61	Compare 30GB	3 days	—	$0.75/GB	$7.50/day	$22.50 $22.50 $21.38 $0.75/GB	Get eSIM
62	Compare Unlimited 30GB/day	5 days	30GB/day	—	$4.58/day	$22.90 $22.90 $21.76	Get eSIM
63	Compare 30GB	5 days	—	$0.77/GB	$4.60/day	$23.00 $23.00 $21.85 $0.77/GB	Get eSIM
64	Compare Unlimited 1GB/day	30 days	1GB/day	—	$0.80/day	$23.90 $23.90 $22.71	Get eSIM
65	Compare Unlimited 10GB/day	7 days	10GB/day	—	$3.41/day	$23.90 $23.90 $22.71	Get eSIM
66	Compare 30GB	7 days	—	$0.80/GB	$3.43/day	$24.00 $24.00 $22.80 $0.80/GB	Get eSIM
67	Compare 30GB	10 days	—	$0.83/GB	$2.49/day	$24.90 $24.90 $23.65 $0.83/GB	Get eSIM
68	Compare 30GB	15 days	—	$0.86/GB	$1.73/day	$25.90 $25.90 $24.60 $0.86/GB	Get eSIM
69	Compare Unlimited 2GB/day	20 days	2GB/day	—	$1.40/day	$27.90 $27.90 $26.51	Get eSIM
70	Compare Unlimited 5GB/day	10 days	5GB/day	—	$2.79/day	$27.90 $27.90 $26.51	Get eSIM
71	Compare 30GB	30 days	—	$0.96/GB	$0.96/day	$28.90 $28.90 $27.46 $0.96/GB	Get eSIM
72	Compare Unlimited 3GB/day	15 days	3GB/day	—	$2.06/day	$30.90 $30.90 $29.35	Get eSIM
73	Compare Unlimited No daily cap	10 days	No daily cap	—	$3.09/day	$30.90 $30.90 $29.35	Get eSIM
74	Compare Unlimited 30GB/day	7 days	30GB/day	—	$4.41/day	$30.90 $30.90 $29.35	Get eSIM
75	Compare Best price/GB 50GB	3 days	—	$0.66/GB	$10.97/day	$32.90 $32.90 $31.26 $0.66/GB	Get eSIM
76	Compare Unlimited 10GB/day	10 days	10GB/day	—	$3.39/day	$33.90 $33.90 $32.21	Get eSIM
77	Compare 50GB	5 days	—	$0.70/GB	$6.98/day	$34.90 $34.90 $33.16 $0.70/GB	Get eSIM
78	Compare 50GB	7 days	—	$0.72/GB	$5.13/day	$35.90 $35.90 $34.11 $0.72/GB	Get eSIM
79	Compare 50GB	10 days	—	$0.76/GB	$3.79/day	$37.90 $37.90 $36.00 $0.76/GB	Get eSIM
80	Compare 50GB	15 days	—	$0.78/GB	$2.60/day	$39.00 $39.00 $37.05 $0.78/GB	Get eSIM
81	Compare Unlimited 3GB/day	20 days	3GB/day	—	$2.05/day	$40.90 $40.90 $38.86	Get eSIM
82	Compare Unlimited 2GB/day	30 days	2GB/day	—	$1.40/day	$41.90 $41.90 $39.81	Get eSIM
83	Compare Unlimited 5GB/day	15 days	5GB/day	—	$2.79/day	$41.90 $41.90 $39.81	Get eSIM
84	Compare 50GB	30 days	—	$0.88/GB	$1.46/day	$43.90 $43.90 $41.71 $0.88/GB	Get eSIM
85	Compare Unlimited 30GB/day	10 days	30GB/day	—	$4.39/day	$43.90 $43.90 $41.71	Get eSIM
86	Compare Unlimited No daily cap	15 days	No daily cap	—	$3.06/day	$45.90 $45.90 $43.61	Get eSIM
87	Compare Unlimited 10GB/day	15 days	10GB/day	—	$3.39/day	$50.90 $50.90 $48.36	Get eSIM
88	Compare Unlimited 5GB/day	20 days	5GB/day	—	$2.80/day	$55.90 $55.90 $53.11	Get eSIM
89	Compare Unlimited 3GB/day	30 days	3GB/day	—	$2.03/day	$60.90 $60.90 $57.86	Get eSIM
90	Compare Unlimited No daily cap	20 days	No daily cap	—	$3.05/day	$60.90 $60.90 $57.86	Get eSIM
91	Compare Unlimited 30GB/day	15 days	30GB/day	—	$4.39/day	$65.90 $65.90 $62.61	Get eSIM
92	Compare Unlimited 10GB/day	20 days	10GB/day	—	$3.35/day	$66.90 $66.90 $63.56	Get eSIM
93	Compare Unlimited 5GB/day	30 days	5GB/day	—	$2.50/day	$74.90 $74.90 $71.16	Get eSIM
94	Compare Unlimited No daily cap	30 days	No daily cap	—	$2.50/day	$74.90 $74.90 $71.16	Get eSIM
95	Compare Unlimited 30GB/day	20 days	30GB/day	—	$4.35/day	$86.90 $86.90 $82.56	Get eSIM
96	Compare Unlimited 10GB/day	30 days	10GB/day	—	$3.00/day	$89.90 $89.90 $85.41	Get eSIM
97	Compare Unlimited 30GB/day	30 days	30GB/day	—	$4.33/day	$129.90 $129.90 $123.41	Get eSIM

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ByteSim eSIM Plans for Japan