Japan
The Netflix ISP Speed Index is a measure of prime time Netflix performance on particular ISPs (internet service providers) around the globe, and not a measure of overall performance for other services/data that may travel across the specific ISP network.
ISP Leaderboard - May 2018
| Rank | ISP | Speed Mbps | Previous Mbps | Rank Change | Type | |
|---|---|---|---|---|---|---|
| 1 | au Hikari (KDDI) | 3.96 | 4.03 | No change |
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| 2 | Softbank - Fiber | 3.64 | 3.71 | No change |
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| 3 | UCOM | 3.52 | 3.56 | No change |
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| 4 | eo Hikari (K-Opticom) | 3.41 | 3.45 | No change |
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| 5 | Tokai Communications | 3.30 | 3.34 | No change |
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| 6 | OCN (NTT Com) | 3.22 | 3.29 | +2 |
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| 7 | J:COM | 3.21 | 3.29 | No change |
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| 8 | So-net | 3.19 | 3.22 | +3 |
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| 9 | iTSCOM | 3.19 | 3.29 | -3 |
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| 10 | Asahi Net | 3.17 | 3.24 | -1 |
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| 11 | IIJ | 3.15 | 3.23 | -1 |
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| 12 | VECTANT | 3.08 | 3.02 | +1 |
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| 13 | BIGLOBE | 3.05 | 3.15 | -1 |
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| 14 | NIFTY | 2.57 | 2.59 | No change |
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| 15 | KDDI Cable/DSL/Wireless | 2.46 | 2.46 | +1 |
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| 16 | NTTPC InfoSphere | 2.42 | 2.49 | -1 |
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| 17 | Freebit | 2.26 | 2.37 | No change |
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| 18 | Softbank - DSL | 1.97 | 1.98 | No change |
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