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 - June 2017
| Rank | ISP | Speed Mbps | Previous Mbps | Rank Change | Type | |
|---|---|---|---|---|---|---|
| 1 | au Hikari (KDDI) | 4.35 | 4.41 | No change |
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| 2 | UCOM | 3.84 | 3.94 | No change |
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| 3 | eo Hikari (K-Opticom) | 3.81 | 3.91 | No change |
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| 4 | J:COM | 3.63 | 3.69 | No change |
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| 5 | Tokai Communications | 3.55 | 3.58 | +1 |
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| 6 | Softbank - Fiber | 3.50 | 3.58 | -1 |
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| 7 | OCN (NTT Com) | 3.46 | 3.50 | +3 |
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| 8 | Asahi Net | 3.46 | 3.56 | -1 |
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| 9 | iTSCOM | 3.46 | 3.53 | -1 |
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| 10 | NIFTY | 3.40 | 3.53 | -1 |
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| 11 | IIJ | 3.38 | 3.44 | +1 |
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| 12 | BIGLOBE | 3.36 | 3.00 | +2 |
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| 13 | VECTANT | 3.35 | 3.49 | -2 |
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| 14 | So-net | 3.30 | 3.35 | -1 |
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| 15 | Softbank - DSL | 2.83 | 2.84 | No change |
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| 16 | NTTPC InfoSphere | 2.73 | 2.71 | +2 |
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| 17 | KDDI Cable/DSL/Wireless | 2.67 | 2.72 | No change |
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| 18 | Freebit | 2.60 | 2.76 | -2 |
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